Transportation Engineering
Services

The $450M+ IH 10 Major Interstate Reconstruction project represents a significant investment in mobility and safety for one of San Antonio’s most important transportation corridors. The project is expanding IH 10 from a four-lane rural highway to a six-lane freeway with continuous two-lane frontage roads, providing additional capacity to meet growing traffic demands. LTRA led the final highway design for three separate PS&E packages as the prime provider, supporting TxDOT’s goal of advancing the project on an accelerated schedule. The design incorporated solutions to reduce utility conflicts and streamline relocations. LTRA also addressed hydraulic considerations related to the corridor’s flat terrain and multiple stream crossings. To further support project delivery, the design minimized right-of-way impacts and optimized the project footprint. LTRA’s work is contributing to the efficient advancement of this key interstate improvement for the San Antonio region.

LTRA lead the $130M+ major Interstate project on IH 35E at Mayhill that significantly improved the highly urbanized IH 35E corridor in North Texas. The project scope included full reconstruction of several miles of the IH 35E mainlanes and frontage roads through Mayhill, Brinker Rd and Loop 288. The project removed the existing IH 35E bridge over Mayhill that acted as a regional bottleneck by only accommodating one through lane in each direction. The replacement IH 35E bridges expanded Mayhill traffic capacity to three through lanes in each direction, creating a valuable North-South major arterial roadway for Denton County Residents. After a Buc-ees was constructed at Brinker Rd during the design process, LTRA developed multiple alternatives to address the mobility and traffic operations impacts of such a large traffic generator. LTRA eventually selected and designed frontage road bypass bridges to reduce traffic loads at the Brinker Rd frontage road signalized intersections, incorporating traffic operations solutions into the overall IH 35E Mayhill project. LTRA’s design efforts will reduce delays for the travelling public and improve safety along important regional corridors in North Texas.

LTRA led the final highway design for new location multilevel interchange between IH 30 and NTTA’s President George Bush Turnpike (PGBT). LTRA coordinated with both TxDOT and NTTA throughout design to facilitate a collaborative project development process for the interchange between TxDOT and NTTA roadway facilities. The multilevel freeway interchange included four new direct connector bridges as well as twin 1+ mile 4-lane bridges spanning Lake Ray Hubbard. Design of the lake bridges required extensive coordination with Dallas Water Utilities that owns the water rights to Lake Ray Hubbard. LTRA developed special drainage designs for the lake bridges to capture the first flush during rainfall events to restrict pollutants and suspended solids from entering Lake Ray Hubbard. The sequence of construction for the interchange was developed to open direct connectors from IH 30 to PGBT early to maximize toll revenue for NTTA while also maintaining existing traffic on a highly congested section of IH 30. The IH 30 – PGBT interchange connected the entire PGBT Eastern Extension to IH30, significantly improving mobility in the region.

LTRA was the lead designer for the $100M+ project to reconstruct and widen 7+ miles of SH 105 between Sour Lake and Pine Island Bayou in Hardin County for the TxDOT Beaumont District. Within the city limits of Sour Lake, a 4/6-lane urban typical section was designed that included raised medians to improve safety, median openings for dedicated left turn lanes, and sidewalks to accommodate both bicyclists and pedestrians. In the rural section of the project, LTRA developed a five-lane typical section with a continuous left turn lane to replace the existing two-lane rural highway. The combined urban and rural designs significantly improved safety along SH105 by providing separate lanes for turning vehicles and through traffic. LTRA developed the ROW mapping documents to support TxDOT’s ROW acquisition process along the corridor. LTRA also lead Utility Coordination efforts on SH 105 that included 20+ major petroleum pipeline crossings. Roadway and ditch designs were revised to eliminate almost all conflicts with petroleum pipeline crossings, significantly reducing cost and schedule impacts for TxDOT.

LTRA is leading the final design for this $1 Billion+ new location freeway through one of the fastest growing counties in the US. The new location freeway section of US 380 will serve as alternative route to existing US 380 and improve congestion, increase mobility, and reduce crash rates in the area. The US 380 freeway design includes a 6-lane mainlane typical section with 2-3 lane frontage roads. The project also includes 7 new location grade separated interchanges at W University Dr, Wilmeth Rd, Bloomdale Road West, Ridge Rd, Lake Forest Dr, Taylor Burk Dr, and Bloomdale Road East. Complex HEC-RAS 2D H&H modeling was developed to support the design of the US 380 corridor across the Elm Fork Trinity River. LTRA coordinated with TxDOT and multiple stakeholders to ensure key design issues are addressed in a corridor that is rapidly developing. LTRA is assisting TxDOT to develop a staged implementation construction plan for the US 380 corridor that will fit within TxDOT’s budget. The US 380 project is one of the largest final design projects currently in the TxDOT Dallas District.

LTRA was chosen by the City of Dallas to lead multiple regional mobility and development projects across Dallas. One of the projects included the schematic and PS&E design to develop 0.5 miles of Camp Wisdom into a 4-lane divided section. LTRA coordinated with City of Dallas, TxDOT, and Dallas County in a regional effort to develop safety improvements at the FM 1382 intersection with Camp Wisdom. LTRA enhanced safety at FM 1382 with signalization and improved pedestrian and bicycle mobility with a dedicated paved trail. LTRA was able to develop roadway designs to salvage and maintain recent existing road improvements constructed by an adjacent development. The innovative design avoided significant roadway reconstruction, saving the City of Dallas several million dollars.

LTRA was chosen by City of DeSoto to lead a regional mobility and development project in the DFW area involving the schematic and PS&E design for a 0.7-mile, 4-lane divided section of Danieldale Rd through DeSoto, Texas. The goal of the project was to provide a roadway facility that will accommodate expanding transportation demands while increasing operational efficiency. LTRA Worked together with City of Desoto, Dallas County, TxDOT, and adjacent developers to develop a transportation solution that best met the combined needs of the community. Danieldale was realigned at the Westmoreland Rd intersection to create a safer intersection configuration. LTRA improved pedestrian mobility with a sidewalk on the north side of the roadway and a pedestrian trail on the south side of Danieldale.

LTRA was chosen by the City of Dallas to lead a beautification and trail connection project for this 1,500 ft, 4-lane undivided section through the heart of Southern Methodist University (SMU) in Dallas, Texas. The project extended from Central Expressway to Greenville Ave through a fully developed retail area with a DART light rail crossing. LTRA was tasked with adding aesthetic features such as decorative medians and sidewalk, brick pavers in pavement and intersections, landscaping, and art features. LTRA ensured the design accommodated a “complete street” concept where the corridor was designed to utilize multi modal transportation (bikes, trail, street parking, and transit). LTRA coordinated with City of Dallas, TxDOT, and SMU to develop a design that improved mobility and safety with improved aesthetics. LTRA also coordinated with DART to connect the SMU Blvd project to the DART trail system servicing the adjacent light rail station.

LTRA was chosen by DFW Airport to manage the design of 32 acres of mixed use development that included the future DFW Airport headquarters building. The development was located on the east side of International Parkway, between Rental Car Drive and the Consolidated Rental Car Center. Project scope included the development of commercial pad sites and all required civil infrastructure (roadways, drainage, grading, etc.). LTRA proactively developed site grading and drainage for the project with minimal disruption to Trigg Lake, a drainage reservoir serving the entire DFW airport property. LTRA was able to maintain traffic operations to International Parkway and Rental Car Drive by strategically phasing roadway construction elements. The Southgate Plaza project was completed and DFW moved into their new headquarters building in 2016.

LTRA was chosen by the City of Dallas to lead feasibility, schematic, and PS&E design for this 0.7-mile, 4-lane undivided section through southeast Dallas, Texas. LTRA was tasked with developing several route alternatives and developing a schematic and construction drawings for the preferred alternative. The Wheatland project was a joint project with the City of Dallas leading the development process and TxDOT providing construction funding and letting Wheatland Rd as a local let project. LTRA collaborated with both the City of Dallas and TxDOT throughout the process to help facilitate the priorities of each entity. LTRA guided the City of Dallas through a challenging ROW acquisition process with proactive early engagement and communication with adjacent property owners to determine design preferences and minimize issues.

LTRA was chosen by TxDOT Dallas District and Denton County to lead a major regional mobility and development project in North Texas by developing both the schematic and PS&E designs for FM 1385. This major project upgrades 12.1-miles of existing 2-lane rural roadway to a 6-lane divided urban typical section from US 380 in Prosper, TX to FM 455 in Pilot Point, TX. LTRA worked with various cities (Pilot Point, Prosper, Celina, Aubrey), Denton County, TxDOT, and multiple developers to accommodate a constantly changing environment in a rapidly developing sector of Denton County. LTRA identified and resolved conflicts with several major regional utilities by refining the roadway geometry, cutting months off the schedule and reducing utility relocation costs by several million dollars. LTRA divided the FM 1385 corridor into three separate construction packages to accommodate TxDOT funding constraints. The FM 1385 project will improve safety and reduce delays on an important regional arterial in Denton County.

LTRA is leading the preliminary design for Loop 1604 for the TxDOT San Antonio District. The project includes developing the schematic design, environmental permitting, and public involvement from Military Dr to IH 35 on the southwest side of San Antonio. This portion of the Loop 1604 corridor is located along one of the fastest growing areas in San Antonio. For the section north of US 90, the project involves an expansion from a 4-lane rural section to a full 8-lane freeway section that will include 3-lane frontage roads. South of US 90, the schematic will accommodate widening the existing 2-lane section with an Interim project with considerations for future Ultimate conversion to a freeway typical section. The design will also include multilevel interchanges at both US 90 and IH 35.

LTRA was chosen by the TxDOT Dallas District to lead the schematic design, environmental permitting, and public involvement for this critical freeway link between Dallas and DFW Airport. Project scope included preliminary design for the reconstruction and expansion of 7 miles of SH 114 from International Parkway to Riverside Drive with a 6 to 8 lane freeway section with one dedicated managed lane in each direction. LTRA developed complex geometrics for a new 5-level direct connector interchange between SH 114 and the President George Bush Turnpike (PGBT). The highly urbanized corridor and existing dense commercial development added to project complexity. The project corridor spanned multiple municipalities and required coordination with Irving, Las Colinas, DART, DFW Airport and multiple major stakeholders and corporations.

LTRA is the prime consultant for this 38-mile schematic project for the TxDOT San Angelo District from the Concho County Line to Junction, TX. LTRA completed schematic design, environmental permitting, traffic analysis, and public involvement for the project. US 83 is a part of the “Ports to Forts” Corridor which will be designated as Interstate 14, a new multi-state interstate highway to connect major military bases in the southern US. The project was phased to widen the existing 2-lane rural highway to a 4-lane divided highway, with a typical section and roadway geometry that will accommodate future conversion of US 83 to a controlled access interstate. Interchange alternatives were considered for multiple rural interchange locations along US 83. LTRA engaged in extensive public involvement for the project, incorporating public feedback into the schematic process.

LTRA was part of the design-build team responsible for providing supplemental surveying services, utility design, SUE, and civil design for the 26-mile commuter rail project from DFW Airport to Plano. LTRA was responsible for the civil and drainage design of 11 miles of Segment 3 of the project from the Dallas North Tollway in Dallas to Shiloh Road in Plano. Project scope included civil design packages at 28 rail crossing locations in the Cities of Dallas, Richardson and Plano. Responsibilities also included laying out track panels and coordinating with system elements for gate locations and sidewalk escape paths. Drainage design included preparing hydrology and hydraulics for the 11-mile corridor and preparing Hydraulic Technical Memos for 5 FEMA Zone AE stream crossings. LTRA also developed relocation and accommodation plans for 43 water lines and 22 wastewater lines spanning seven cities, Municipal Utility Districts (MUDs), and Special Utility Districts (SUDs). LTRA coordinated closely with each city and utility owner to ensure compliance with specific design criteria and adjusted designs as needed based on their feedback. LTRA supported the successful delivery of this significant regional transit project.

LTRA was part of the Design Build team working in collaboration with Dallas Area Rapid Transit (DART) to design the last section of the Orange line from Belt Line Rd to Terminal A Station, inside DFW International Airport. LTRA was responsible for the design of the Civil, Demolition, Drainage, and Utility Relocations for segment 3. Project scope included the design and reconstruction of a four-lane major arterial, North Airfield Drive, from west of Freeport Parkway to Grapevine Creek. LTRA developed paving and drainage designs, which included roadway geometrics, cross sections, and storm drain design. LTRA was also responsible for SUE on Sections 1 and 2 of the Orange Line through Irving, generating Level B SUE for water, wastewater, telephone, fiber optic cable, gas, pipelines, traffic signal, and electric utilities. LTRA worked closely with 19 different utility companies, municipalities and DART to develop a Utility Conflict Matrix that was eventually reduced to only 134 conflicts with the new location rail line through proactive coordination. LTRA supported the successful delivery of this significant regional transit project that has increased ridership on DART and spurred significant transit-oriented development around the new stations.

LTRA was the lead firm for preparing construction plans for double tracking the Trinity Railway Express (TRE) line from IH 35W to east of S. Sylvania Ave. LTRA prepared the civil sheets including the demolition plan, track plan and profile sheets, typical sections, drainage area map and calculations, guideway drainage plan and profile sheets, hike and bike revisions, and temporary erosion control. Railroad bridges over a creek, North South Freeway, West Fork of the Trinity River and Sylvania Avenue were designed with the project. The plans included details for rehabilitation of the existing trestle bridge over West Fork Trinity River and a new steel through plate girder bridge spanning the river. During project development LTRA coordinated with TRE, City of Fort Worth, TxDOT, COE and the adjacent designer of 35W corridor. LTRA also captured Mobile LiDAR data from a High Rail Vehicle and produced a topographic feature on the existing trestle bridge and its super structure to support the bridge rehabilitation. Adjacent topographic features were extracted from the LiDAR cloud data to show a complete 3D model of the existing bridge and the surrounding area of the Trinity River bottom.

LTRA was chosen by the TxDOT Paris District to lead the schematic design, environmental permitting, and public involvement for one of the largest highway expansion projects in NE Texas. LTRA split the IH 30 corridor into separate schematics with limits from FM 2642 to Monty Stratton (13 miles) and from Monty Stratton to FM 513 (12 miles). The objective of the IH 30 project was to improve safety, enhance mobility, and reduce traffic congestion on IH 30 and intersecting roadways. Numerous interchange reconstructions were designed with the project in conjunction with ramp reversals from diamond to X ramp configurations. Multiple innovative interchange alternatives were considered, including the Single Point Urban Interchange (SPUI) selected for the IH 30 – US 69 interchange. LTRA communicated with multiple key stakeholders to ensure key design issues were incorporated into the schematic.