Selected work across 12 service areas — from on-call agency partnerships to partnering on multi-billion dollar design-build megaprojects.
Design-Build and complex multi-prime delivery on high-value infrastructure
GKW served as civil engineering subconsultant to the Williams Brothers/Jacobs Engineering design-build team on San Antonio's first major design-build highway project, contracted through the Alamo Regional Mobility Authority. The approximately 8-mile corridor along US 281 and Loop 1604 — long exceeding capacity and ranking among the region's most congested and collision-prone interchanges — received four new direct connectors, main lane and frontage road upgrades, bike lanes, and two pedestrian bridges over US 281. GKW was responsible for pavement markings, overhead signs and supports, traffic signalization upgrades, and pedestrian signal improvements. A key design challenge was shifting the northbound direct connectors from right-side to left-side alignment — affecting overhead sign bridges, signs, and pavement markings system-wide. Because design-build required construction to begin on the same day as notice to proceed, GKW operated on an accelerated production schedule — evaluating existing structures and salvaging reusable signs to control costs. The project was delivered ahead of schedule. Contract value: $150 million. Completed 2013.
As subconsultant to Trinity Infrastructure LLC/Bridgefarmer on one of the most complex transportation projects in U.S. history, GKW performed a comprehensive Synchro traffic operations study to develop alternate detour routes and a Traffic Management Plan (TMP) for the 13.3-mile IH 635 (LBJ TEXpress) Managed Lanes design-build in Dallas. GKW analyzed multiple detour corridors to determine optimal routing for diverted traffic during managed lane construction, roadway closures, and frontage road reconfigurations — minimizing community disruption and maintaining acceptable levels of service throughout construction. Findings were coordinated with TxDOT and local agencies to support construction sequencing and permitting. The $2.7B public-private partnership (P3) between TxDOT and LBJIG officially opened in September 2015 — with variable-priced TEXpress Lanes saving peak-hour commuters up to 35% travel time. The project became a national model for P3 freeway reconstruction and remains in operation through a concession period extending to 2061.
GKW prepared a comprehensive Traffic Impact Analysis (TIA) for the new UT Health Rio Grande Valley medical campus at the SW corner of FM 3362 (N. Jackson Rd.) and FM 495 (E. Pecan Blvd.). GKW analyzed 29 intersections within the one-mile study area, with a final TIA addressing 10 key intersections and two site driveways. Services included schematic design of driveways and internal streets, TxDOT street typical sections & lane assignments, cost estimates, construction phasing, and agency coordination. Phase 1 — a 3-story, 141,012 sq. ft. Cancer Center & Ambulatory Surgery Center with 515 parking stalls — held its grand opening in October 2025. Phase 2 adds a hospital, medical office building, and 1,600-space parking garage (325,000 + 60,000 sq. ft. GFA), planned for 2027. When utility conflicts arose during construction, GKW coordinated with TxDOT to secure phased driveway access approval.
City of San Antonio Bond Program projects — pedestrian, intersection & corridor improvements
GKW served as Prime Consultant for the redesign of the iconic Five Points intersection (N. Flores St. & Fredericksburg Rd.) under the City of San Antonio's 2017–2022 Bond Program, in partnership with VIA Metropolitan Transit. Applying Complete Streets and Vision Zero principles, GKW developed multiple lane configurations in Synchro, evaluating bus, bicycle, and pedestrian movements simultaneously. The traffic signals received a full redesign — the existing single controller cabinet was separated into two, enabling independent phasing for buses, bikes, and pedestrians. A dedicated, channelized right-turn lane eases peak-hour congestion at the new eastbound VIA bus stop. Queue jump lanes with leading bus signal intervals allow VIA buses to enter traffic flow in a priority position, reducing schedule delay. Two-stage turn queue bike boxes provide cyclists a safe way to make left turns at this multi-lane intersection. All bus stops were consolidated to the south side of the intersection, reducing pedestrian street crossings to reach transit transfer points. Subconsultants included Bain Medina Bain (survey), Camacho-Hernandez (drainage), Foster CM Group (construction admin), IDCUS (roadway/utility design), and Terracon (geotechnical). Construction completed February 2021.
As a subconsultant to IDCUS (then certified S/MBE and HABE), GKW contributed traffic engineering and civil design services to the approximately 1-mile reconstruction of Bynum Avenue from West Gerald Street south to SW Military Drive (TxDOT SH 13) — part of the City of San Antonio's 2017–2022 Bond Program. Improvements included full pavement reconstruction, new curbs and gutters, ADA-compliant sidewalk construction, driveway approach replacement, minor drainage improvements, and landscaping. GKW's scope focused on traffic engineering design elements: alignment review, intersection geometry, ADA pedestrian access ramps, signing and pavement marking, and coordination with City Public Works staff to maintain access for adjacent residents and businesses throughout construction. The Bynum corridor serves a predominantly residential neighborhood in southwest San Antonio, and the reconstruction addresses long-standing pavement deterioration and pedestrian safety deficiencies. Construction cost: $6.4 million. Bond Program: 2017–2022.
As subconsultant to CDS Muery, GKW developed contract design plans for phasing/sequencing, traffic control plans, traffic signal design (3 intersections), signing, pavement markings, and construction phase services. The 2012 CoSA Bond Savings CIP project reconstructed and widened Goliad Road 1.77 miles to a three-lane urban section with bike lanes, curbs, sidewalks, driveway approaches, retaining walls, utility relocations, and 3,300 LF of drainage improvements with 42 inlets.
Task-order work under City of San Antonio on-call contracts — traffic engineering, civil design, and federally funded pedestrian improvements
Under CoSA's On-Call Traffic Engineering contract (TO#56), GKW evaluated the Commerce/Buena Vista corridor to implement bike lanes from San Joaquin Street to 19th Street. GKW identified sections where bike lanes could be added without road reconstruction or ROW acquisition, then produced construction-ready design plans for bike lane implementation.
GKW provided engineering and construction phase services for sidewalk and driveway improvements along Woodlief Street. Scope included ADA-compliant ramp design per TDLR/TAS/ADA standards, retaining wall details where needed, and full construction management including site visits, pay estimates, and project closeout.
As prime consultant, GKW delivered PS&E and construction management for sidewalk and driveway improvements on Westedge Drive. Services included custom ADA ramp design, retaining wall details, tree protection, and full construction administration from task order issuance through final inspection and punch-list.
GKW provided engineering and construction phase services for sidewalk and driveway improvements along Essex Street. Work included ADA-compliant ramp design, retaining walls, signage, and full construction administration including contractor negotiation, public notices, right-of-entry letters, weekly site visits, and project record drawings.
GKW served as Prime Consultant and Owner's Representative for the City of San Antonio under the IMP & NAMP 2020–2023 On-Call Contract (Task Order-01). The project involved approximately 1,100 linear feet of full reconstruction and widening of Padre Drive from Roosevelt Ave to VFW Blvd. GKW prepared complete PS&E design plans encompassing street excavation, lime treatment, new flexible base, milling and overlay, ACP pavement, curb and gutter, driveways, sidewalks, signing, pavement markings, signage, and traffic control plans — with all sidewalks and ADA ramps designed to current standards. GKW assisted CoSA with bid documents, evaluated submittals, and recommended contract award. During construction, GKW provided full Construction Phase Services including weekly site visits, progress meetings, RFI responses, change order preparation, contractor quantity sheet reviews, PrimeLink estimate approvals, a final punch list, and project closeout. Construction was completed September 2021, with GKW delivering both design and CM as a one-stop solution with little to no issues.
As Prime Consultant under the City of San Antonio's On-Call Services for Traffic Engineering contract (Task Orders 04, 08, 14, 18, 29 & 83), GKW led feasibility and operations analysis, a multi-modal 3-D visualization animation, design plans, and construction planning for the reconstruction of S. Alamo Street from Probandt Street to Pereida Street — a 1,600-foot corridor through the King William Historic District. Originally scoped as part of a San Antonio River Authority (SARA) river-improvement project, GKW collaborated with the SARA design team to advance the street-level improvements under transportation funding, with public involvement built into the process throughout. GKW led the design team through a full PS&E plan set for pavement milling and selective reconstruction, new sidewalks, ADA ramps, and improved drainage — reconfiguring the corridor from 4 lanes to 3 lanes with a center turn lane based on traffic analysis, and widening sidewalks from as little as 4 feet up to 12 feet. Curb ramps, crosswalks, and median refuges were upgraded to current ADA standards, along with new landscaping and lighting. GKW also coordinated with VIA Metropolitan Transit and the King William Historic District to consolidate bus stops and improve pedestrian access to the adjacent Blue Star Arts Complex, and coordinated staged utility replacement work among multiple contractors, including SAWS water and sewer replacement — a 12-inch water line and a bored 36-inch sewer line beneath the San Antonio River. Subconsultants included Bain Medina Bain (survey), Terracon (geotechnical/environmental), and Traffic Operations Support Group (RAS/TDLR/ADA compliance).
Bus rapid transit, signal priority design, and VIA Metropolitan Transit planning support
GKW provided traffic engineering services as a subconsultant to HNTB on VIA Metropolitan Transit's 12-mile, 26-station Green Line Advanced Rapid Transit (BRT) corridor — a $480 million investment linking key activity centers across San Antonio. Scope included traffic and parking studies, intersection layouts with elevations, street typical sections, traffic signal plans, signing and pavement marking, illumination, drainage upgrades, cost estimates, and construction sequencing plans. Bluebeam was used for collaborative design and cost review. The Green Line is projected to open to service in 2027.
As part of the IDC team, GKW was assigned Work Authorization #1 to evaluate the effectiveness and efficiency of VIA's Primo Bus Rapid Transit service on the Fredericksburg Road corridor. VIA launched Primo in December 2012, connecting the UTSA-Loop 1604 campus to the South Texas Medical Center and downtown San Antonio. GKW's study evaluated the impact of Traffic Signal Priority (TSP) on Fredericksburg Rd. and cross-street traffic flows; measured on-time performance (OTP) under pre- and post-Primo conditions; assessed the contribution of dedicated BRT stations, distinctive vehicles, and real-time "next bus" passenger information displays; and benchmarked VIA Primo against national BRT peers. Findings supported VIA's long-term BRT corridor strategy. Contract period: January–July 2014.
Developed VIA's agency-wide Intelligent Transportation Systems architecture, standardizing Transit Signal Priority (TSP) technology across all corridors and mapping elements to the National ITS Architecture v7.0.
GKW supporting VIA's planned Silver Line high-capacity rapid transit project in San Antonio.
Field assessment of 7,000+ VIA bus stops for ADA accessibility and condition. IDC Prime, GKW field support — 2015.
Traffic and transportation studies serving university and college campuses across Texas
GKW prepared the Traffic Impact Analysis and circulation study supporting Palo Alto College's Natatorium, Wellness & Multigenerational Center, a renovated approximately 90,334 sq. ft. facility open to both students and the general public. The center offers fitness spaces, multipurpose rooms, indoor aquatics including a 50-meter Olympic pool, educational classrooms, and an indoor basketball/volleyball court. Architect: RVK Architects. Contractor: Joeris General Contractors.
GKW prepared the Traffic Impact Analysis for the Alamo Colleges District's Center of Excellence for Student Success (ACCESS Building), located near Broadway & Cunningham Ave/Alamo St. on the former Playland Park property. The building provides centralized administrative and district-wide services for all five Alamo Colleges, along with the Carlos Alvarez Family Welcome Center for prospective, transferring, and returning students. Architect: Ford, Powell & Carson and WestEast Design Group. Contractor: Skanska USA Building Inc.
GKW prepared the Traffic Impact Analysis and circulation study for San Antonio College's new 5-level, 732-space parking garage (a net addition of 355 spaces), which triggered a City of San Antonio-required added scope: San Pedro Street improvements from W. Evergreen St. to 400 ft past W. Myrtle St. GKW developed detailed conceptual drawings covering concrete sidewalk removal and reinstallation, new turn-lane medians at W. Park and the Scobee Loop exit, traffic signal revisions, underground electrical coordination with CPS Energy, storm drain utilities, temporary traffic control during construction, and final pavement markings, signage, and ADA crossings. Architect: O'Connell Robertson. CMAR: J.T. Vaughn Construction, LLC.
For ASU's Centennial Master Plan 2028 Update, GKW assessed Johnson Street bisecting campus and disrupting pedestrian connectivity. Applying Context Sensitive Solutions (CSS) and multi-modal design principles, GKW developed options to balance vehicle capacity with improved pedestrian safety, sight lines, and campus cohesion.
TIA studies supporting institutional and campus development across Texas
GKW prepared the Traffic Impact Analysis and circulation study for San Antonio College's new Early Childhood Center and John L. Santikos Micronaut Center, an approximately 21,000 sq. ft. daycare facility with food prep and warming kitchen, changing stations, reading and multipurpose classrooms, outdoor learning play areas, a parent drop-off loop, and a secure entry vestibule. Architect: O'Connell Robertson. CMAR: J.T. Vaughn Construction, LLC.
GKW prepared the Traffic Impact Analysis for San Antonio College's new Science Building, an approximately 19,605 sq. ft. facility with 7 flexible labs for microbiology, anatomy, physiology, and general biology, student multipurpose and flex areas, and an outdoor learning courtyard. Architect: O'Connell Robertson. CMAR: J.T. Vaughn Construction, LLC.
GKW prepared the Traffic Impact Analysis and circulation study for San Antonio College's First Responders Academy, an approximately 39,200 sq. ft. facility with classrooms and specialty training spaces, storage and locker rooms, an outdoor covered event and training space, a driving course, and dedicated parking for students and staff. Architect: O'Connell Robertson. CMAR: Gilbane.
GKW prepared a Level 3 Traffic Impact Analysis for San Antonio College's Empowerment Center, a one-stop facility providing academic advising, enrollment assistance, career development, and family-oriented support services for adult, low-income, and non-traditional students — including veterans, Dreamers, and working parents. GKW evaluated traffic circulation, site access configuration, driveway spacing, pedestrian connections, and the facility's impacts on surrounding intersections under existing and build-out conditions, providing access and operational recommendations to support the campus planning process and City permitting requirements. Partially funded by a $1 million federal allocation, the Empowerment Center celebrated its grand opening in December 2024.
GKW prepared the Traffic Impact Analysis for Palo Alto College's new Veterans Center, an approximately 7,024 sq. ft. facility housing veteran-specific support services, quiet study spaces, recreational areas, and communal space also used to host community training and events. Architect: RVK. Contractor: Joeris General Contractors.
GKW prepared the Traffic Impact Analysis for St. Philip's College's new Tourism, Hospitality & Culinary Arts Building, a 4-story, approximately 62,128 sq. ft. facility featuring 7 classrooms, 5 teaching kitchen labs (including 2 full commercial production kitchens), a 100-seat tiered lecture hall, a mock-hotel hospitality area, and two public restaurants. Architect: Page. CMAR: Skanska USA Building, Inc.
GKW prepared the Traffic Impact Analysis and circulation study for San Antonio College's Westside Education and Training Center, an approximately 46,907 sq. ft. facility featuring Veterans Outreach services, student collaboration areas, a digital library, a testing center, and specialty labs including nanotechnology, water resources, and chemistry. Architect: HKS. Contractor: Joeris General Contractors.
As subconsultant, GKW provided a TIA for the proposed Alamo Colleges North Central Campus along IH-10 and Balcones Creek Parkway — a new facility of up to 840,000 sq ft plus a 50,000 sq ft high school. GKW reviewed access management compliance, coordinated with TxDOT on IH-10 West improvements, and demonstrated through traffic modeling that a diamond interchange signal upgrade could be deferred by converting from one-way to two-way operations.
Based on recommendations from GKW's approved Traffic Impact Analysis, GKW developed the design concept for a new deceleration lane off the westbound IH-410 Loop frontage road at Palo Alto College's 410 campus entrance — a 12-ft-wide, 515-ft-long lane with a 415-ft storage length and a 100-ft taper.
Signal design, intersection analysis, and corridor operations studies
GKW served as a traffic engineering subconsultant to Jacobs Engineering on TxDOT's feasibility study for the I-410 / US 281 / San Pedro Avenue interchange — one of the most congested corridors in Texas. GKW contributed existing conditions analysis, future traffic modeling under no-build and improvement scenarios, and conceptual schematic designs for the interchange, plus corridor layout work for San Pedro Ave. between Loop 410 and US 281, with Jacobs serving as TxDOT's project lead and public meetings held in fall 2016 and spring 2017. The interchange improvements GKW evaluated have since advanced through TxDOT's planning and design process and are now moving into construction as the $156 million Loop 410 San Pedro Improvements Project, reconstructing 4.3 miles of I-410 (West Ave. to Broadway St.) and 2.7 miles of US 281 (I-410 to E. Nakoma Dr.) with new and relocated ramps, intersection and frontage road improvements, and select frontage road widening. TxDOT selected Webber, LLC as the construction contractor, with construction expected to begin fall 2026 and continue through 2029. GKW's role on this project was limited to the 2016–2017 feasibility study — GKW was not involved in the design (PS&E) or construction phases now underway.
GKW served as Prime Consultant for Phase 1C of the high-profile Broadway Corridor Comprehensive Study & Schematic Design, covering Roy Smith (near I-35) to Burr St. and Houston St. to I-35 in San Antonio. GKW built and ran a Synchro traffic model covering 19 intersections along a 1.5-mile section of Broadway (Houston St. to Josephine St.) to demonstrate that a road diet — reducing travel lanes to accommodate bike lanes, wider sidewalks, transit stops, on-street parking, and landscaping — could maintain acceptable levels of service at key intersections. To communicate the complex multi-modal design to City Council and the public, GKW commissioned a VISSIM 3-D animation, producing videos presented to CoSA officials and the general public. The selected schematic incorporated dedicated bike lanes, highly visible pedestrian crossings, VIA transit stops, major street left-turn lanes, green infrastructure, and on-street parking. GKW also coordinated with IDCUS on a detailed drainage study incorporating Low Impact Development (LID) features and storm drainage upgrades to reduce flooding on Broadway. Estimated construction: $57.5 million.
As subconsultant to prime consultant Iteris, GKW developed and implemented optimized Synchro timing plans along the City of San Antonio's highest-priority corridors under the CMAQ Citywide Signal Timing Program, balancing green-wave bandwidth against a Performance Index weighted for greenhouse gas emissions. On the 4.7-mile, 12-intersection Babcock Rd. corridor (De Zavala Rd. to Louis Pasteur Dr.), retimed splits and offsets improved the Network Performance Index 8.04% during the AM peak and cut corridor CO emissions by 8.5 kg per day. On the 1.6-mile, 10-intersection Austin Highway corridor (Rittiman Rd. to Eisenhauer Rd.), retiming improved network performance up to 13.6% off-peak and raised travel speeds as much as 10%, while cutting CO emissions by 12.7 kg per day. Each plan was built from field-observed queuing and left-turn analysis, coded in the City's Intelight MaxTime software, and fine-tuned on-site for a minimum of two days after cutover; before-and-after INRIX travel time runs then confirmed the results.
As subconsultant to Lockwood, Andrews & Newnam, Inc. (LAN), GKW provided traffic signal design services for the reconstruction and widening of Ingram Road from Culebra Road to Mabe Road/Potranco Road — part of the City of San Antonio's 2012–2017 Bond Program. The project reconstructed and widened an approximately 2,200-foot, 2-lane segment of Ingram Road to a 4-lane roadway with bicycle facilities, sidewalks, a center two-way left-turn lane, curbs, driveway approaches, and traffic and drainage improvements, tying into a recently completed bridge over Leon Creek. GKW's scope covered temporary and permanent traffic signal design, a permanent signing and pavement marking plan, and bid and construction phase services, across two intersections: Ingram Rd & Culebra Rd, where GKW designed signal adjustments to accommodate a new westbound left-turn lane and raised median along with mast arm replacements and ADA pedestrian upgrades, and Ingram Rd & Mabe Road/Potranco Road, where GKW designed a complete signal upgrade from span wire to mast arms with new box pedestrian crosswalks and ADA pedestrian upgrades. Construction was underway as of early 2016.
Additional Projects
GKW led a traffic engineering study, schematic feasibility analysis, and VISSIM simulation for a 7-block Midtown corridor on Blanco Road near downtown San Antonio. The study evaluated replacement of an existing signalized intersection with a modern roundabout, incorporation of two new traffic signals, and a series of pedestrian and bicycle safety improvements along the corridor. VISSIM micro-simulation modeling validated the operational effectiveness of the proposed roundabout and demonstrated acceptable performance for all corridor movements. GKW presented the VISSIM animation to City stakeholders to communicate the design's benefits. The project reflects GKW's expertise in multimodal corridor analysis, alternative intersection design, and public-facing visualization for community-sensitive urban corridors.
GKW evaluated the Frio City Road/South Zarzamora Street intersection, where a railroad crossing created severe traffic queuing after train events. The study assessed alternatives with aerial layouts, narrative descriptions, preliminary cost estimates, and public involvement visuals. Short-term: relocate Kirk Place connection and realign Darby Blvd to reduce signal phases. Long-term: eliminate queuing at grade crossing entirely.
Triggered as required added scope for San Antonio College's new parking garage, GKW developed detailed conceptual roadway design for San Pedro Street improvements from W. Evergreen St. to 400 ft past W. Myrtle St. Scope included concrete sidewalk removal and reinstallation, new medians and turn lanes at W. Park and the Scobee Loop exit, traffic signal revisions, underground electrical coordination with CPS Energy, storm drainage utilities, temporary traffic control and re-routing during construction, and final pavement markings, signage, and ADA-compliant crossings.
Long-range corridor visioning, multi-modal planning studies, and interstate access analysis
As Prime Consultant to the Westside Development Corporation (WDC), GKW led a multi-modal corridor planning study for Cincinnati Avenue from St. Mary's University to Woodlawn Lake Park, a 1.6-mile corridor in City Council District 7. The study was completed in partnership with Town Planning and Design, LLC, incorporating an extensive public engagement process — five bilingual public meetings and a 97-response community survey — alongside a full existing-conditions and safety analysis. GKW developed a recommended concept for a pedestrian- and bicycle-oriented corridor: buffer-protected bike lanes, curb extensions to enhance safety and separate on-street parking from travel lanes, "Dutch Intersection" design principles, streetscaping and pedestrian lighting, and back-alley trail connections tying into San Antonio's Greenway Trail network. The plan also identified two mixed-use development nodes and recommended forming a stakeholder committee to guide the corridor toward future capital funding.
GKW performed the full interstate access justification study for two proposed new ramps on IH 10/US 90 near Presa Street — an eastbound exit ramp to Presa Street and a westbound entrance ramp from Presa Street, with new auxiliary lanes tying into the existing Probandt Avenue ramps — coordinating with the City of San Antonio, TxDOT, and FHWA. As a supporting firm to prime consultant IDC, GKW's traffic analysis used CORSIM freeway simulation and HCM 2010 methodology to evaluate 2015, 2035, and 2045 build and no-build scenarios along the roughly 1-mile stretch of IH 10/US 90 between the IH 35/IH 10 and IH 37/US 281 interchanges. Multiple ramp alternatives were evaluated — two exit-ramp options and four entrance-ramp options — and IDC led a workshop with the City and TxDOT to select a Locally Preferred Alternative that fit within existing right-of-way with no design exceptions needed. The proposed ramps were intended to improve local and regional access for the established residential and commercial area around the historic Missions, including eliminating the need for local traffic to cross five at-grade UPRR railroad crossings. The study was listed in the Alamo Area MPO's Mobility 2035 Long-Range Transportation Plan and included in the City of San Antonio's 2012–2017 voter-approved Bond Program. The interstate access study required FHWA approval to advance to design; the ramps as studied were not approved, primarily due to their proximity to the adjacent IH 35/IH 10 and IH 37/US 281 interchanges.
Engineering speed zone studies for TxDOT districts across Texas
GKW conducted a comprehensive speed zone study across multiple corridors in West Texas — including El Paso, Alpine, Jeff Davis, Marfa, Dell City, and Big Bend — for TxDOT's El Paso District under prime consultant Atkins North America. Over a 5-month study, GKW performed 85th-percentile speed checks using a proprietary field software that automatically populated standard TxDOT speed check forms as a daily deliverable. Data collection was performed with radar guns and GPS-integrated tube counters, across corridors up to 20–40 miles long. GKW also conducted travel runs with video recording, regulatory and warning sign inventories, and curve analysis using TRAMS and TCES software (Texas Transportation Institute / TxDOT). Curve deliverables included Google Earth Pro KMZ files with milepoint, geometry, and advance warning sign recommendations. Completed 2020, on budget and schedule.
GKW performed a speed zone safety study covering approximately 244 miles of corridors outside Fort Stockton, TX for TxDOT's Odessa District under prime consultant Jacobs Engineering. Work included 85th-percentile speed checks using GKW's proprietary field software to auto-generate standard TxDOT speed check forms as daily deliverables. GPS-integrated tube counters and radar guns (three on hand) supported high-volume daily data collection. GKW also conducted travel runs with video recording, regulatory and warning sign inventories, traffic engineering evaluation, and curve analysis using TRAMS and TCES software with KMZ file deliverables. The mobile office setup — developed across multiple TxDOT contracts — enabled continuous fieldwork across remote West Texas corridors. Completed 2023, on budget and schedule.
GKW prepared a traffic engineering letter report evaluating six urban roadway corridors in Del Rio, TX for speed control, under contract with prime consultant Bain Medina Bain. Texas law sets the maximum urban speed limit at 30 mph unless modified by proper authority. For each of the six corridors — Hernandez, Contreras, Viesca, Arrowhead, Tomahawk, and Margaret — GKW conducted 85th-percentile speed zone studies with a speed radar gun per TxDOT's "Procedures for Establishing Speed Zones," performed a crash assessment analyzing patterns, contributing factors, and countermeasures, and issued tailored engineering recommendations. Results included: mini-roundabouts for Hernandez, Contreras, and Viesca; lane reduction via continuous left-turn lane striping, mini-roundabouts, and on-street parking for Arrowhead; spaced mini-roundabouts and tapered medians for Tomahawk; and conversion of Margaret Lane to one-way northbound from Foster Drive to West Cantu Road, with a roundabout at Foster Drive. Study year: 2018–2019.
Field data collection, traffic counts, and equipment inventories across Texas
Every CMAQ timing plan GKW built for prime consultant Iteris started with field-verified data. For each corridor, GKW's field teams ran continuous 7-day and 24-hour tube counts, collected AM/PM/off-peak turning movement counts (12 hours at major intersections, 5 at minor), and pulled before-and-after travel time data from INRIX IQ Roadway Analytics. GKW also completed a full intersection inventory — cabinet make, model, and serial number; controller type and firmware; pole and mast-arm type and length; signal head count and arrangement; detection and communications equipment; and ADA ramp compliance — entered directly into the City of San Antonio's Signal Inventory System. In Year 3 alone, GKW inventoried 55 signalized intersections across the Austin Hwy., Bandera Rd., Tezel Rd., Culebra Rd., and Medical Dr./Floyd Curl St. corridors, bringing the program total to more than 120 intersections data-collected and inventoried from 2021 to 2024.
GKW performed 85th-percentile speed checks across multiple West Texas corridors — including El Paso, Alpine, Jeff Davis, Marfa, Dell City, and Big Bend — for TxDOT's El Paso District under prime consultant Atkins North America. Data collection was performed with radar guns and GPS-integrated tube counters, across corridors up to 20–40 miles long, using proprietary field software that auto-populated standard TxDOT speed check forms as a daily deliverable. GKW also conducted travel runs with video recording and regulatory/warning sign inventories. Completed 2020, on budget and schedule.
On-site construction inspection, materials oversight, and project documentation for major roadway and infrastructure projects
As a subconsultant to Jacobs Engineering, GKW provided two onsite field inspectors for the 4.5-mile reconstruction and widening of FM 1957 (Potranco Rd) from SH 211 to Loop 1604 in Bexar County Precinct 1 — a $46.3M project for the fast-growing west side of San Antonio. GKW oversaw daily contractor operations, third-party materials testing, and document control throughout construction. Project scope included widening from a two-lane roadway to a five-lane section with new grading, drainage, curb and sidewalk, Warm Mix Asphalt pavement, signing, pavement markings, and traffic signalization. Major structures included a bridge over Medio Creek and large box culverts at Caracol and Potranco Creek, eliminating hazardous low-water crossings, plus MSE and Drill Shaft stabilized retaining walls. Texas Sterling served as prime contractor with 18 subcontractors. Construction was completed February 2019.
GKW won two consecutive City of San Antonio on-call civil engineering contracts for the Infrastructure Management Program (IMP) and Neighborhood Access Mobility Program (NAMP) — the 2020–2023 contract (8 task orders, completed) and the 2023–present contract (13 task orders to date), which GKW won again when the work was re-competed and open to any firm — serving as Prime Consultant on both. GKW provides design, construction oversight, and field inspection for residential street preservation and rehabilitation. GKW staff act as an extension of City personnel — overseeing pavement contractors, entering daily quantities into the City's PrimeLink system, and delivering cloud-based daily reports (workforce, equipment, weather, photos and video) to City staff within 24 hours. Work includes mill and overlay, base repair, curb and gutter, and pavement preservation such as microsurfacing and slurry seal, plus ADA-compliant sidewalk and ramp construction with SAWS and CPS coordination for water meter and pole relocations. The program supports the City's maintenance of more than 4,100 miles of streets.
Traffic Impact Analyses and site access studies for residential and commercial development
GKW prepared a Level 3 Traffic Impact Analysis for a large-scale, two-phase residential development in San Marcos, TX: Phase 1 comprising 266 single-family units and Phase 2 expanding to 2,316 single-family lots. GKW evaluated all proposed access points, intersection warrants, driveway spacing, and site circulation to ensure adequate traffic operations on the surrounding street network at full buildout. The study included trip generation, directional distribution, background growth projections, and level-of-service analysis at study-area intersections under existing, interim, and ultimate conditions. Findings informed turn-lane requirements, access control recommendations, and phased improvement obligations tied to development triggers — providing the developer and local jurisdiction a clear roadmap for transportation infrastructure commitments as the project builds out.