IH 35 / US 183 Interchange Improvements, Travis County - RTG/TxDOT Austin District
Project Task Leader (Traffic Control and Construction Sequencing) – The limits of this IH 35 reconstruction project were from Rundberg lane to US 290E (approximately 2.35 miles). Interchange improvements at IH-35 and US 183 are intended to alleviate traffic congestion and provide better access from one highway to the other. The TxDOT-funded interchange project consists of three new direct connector bridge structures, reconstruction of one existing direct connector bridge entrance, reconstruction of an existing bridge at St. Johns plus two new adjacent turn-around bridges, construction of new MSE and soil nail retaining walls, improved lower roadways, collector-distributor roads under St. Johns and new shared use paths (SUP’s) along the frontage roads to improve the mobility options and safety for pedestrians and cyclists.
Various Overlay Projects – TxDOT Waco District
This SLG contract contains four separate PS&E packages consisting of six different CSJ’s. Preparation of PS&E and related documents is being provided for the preventative maintenance and roadway restoration at the six locations throughout the Waco District. Specific task responsibilities include alignment creation for each CSJ, sheet creation for all parts of plan set development, annotation of all project details, creation of project specific details and quantification of all project bid items. In some sections, roadway reconstruction elements include pedestrian accommodations.
IH 20, Martin County - Jacobs/TxDOT Odessa District
Project Task Leader (Signing and Pavement Markings) – Provided engineering services for the preparation of PS&E and related documents for IH 20 from CR 3151 to SH 137 in Stanton (approx. 3 miles). The project involves roadway and ramp upgrades and reversing a bridge configuration to take the interstate over a frontage road connection. Specific tasks for this project included signing and pavement markings (including development of large sign details).
SIGNALS, Nueces County - Jacobs/TxDOT Corpus Christi District
Project Task Support (Signals) – Provided engineering services for the preparation of PS&E and related documents for the upgrade of traffic signals at three intersections in Corpus Christi. The project involved replacing signal heads, pushbuttons, wiring controller and detection equipment at existing locations. In addition, one intersection required the replacement of two of the four signal mast arm due to impact damage. Replacing these poles required a field assessment of project site to locate poles to avoid utilities, use standard size poles and arms, and comply with ADA.
SL 340, McLennan County - Jacobs/TxDOT Waco District
Project Task Leader (Pavement Markings, TCP, Erosion Control) – The work performed under this contract consisted of providing engineering services required for the preparation of plans, specifications and estimates (PS&E) and related documents, for a seal and overlay project along SL 340 in McLennan County from SP 484 to Williams Road for approximately 3.5 miles. The work included Traffic Control Design, Pavement Markings and completion of the SW3P.
SH 36 & FM 1750, Taylor County - Jacobs/TxDOT Abilene District
Project Task Leader (Pavement Markings, TCP, Erosion Control) – Provided engineering services for the preparation of PS&E and related documents for two mill and overlay projects in Taylor County: SH 36 from Treadway Blvd. to Judge Ely Blvd. (approx. 1.3 miles) and FM 1750 from SH 36 to LP 322 (approx. 1.9 miles). Specific tasks for this project included signing and pavement markings, a traffic control plan and the erosion control plan.
SH 6 Rural Passing Lanes and Urban Reconstruction, Eastland County - TxDOT Brownwood District
Prime Provider – This contract contained two separate PS&E packages. One for the creation of three separate passing lane areas (Super2 Design) and one for full reconstruction and extension of an urban section in the City of Gorman. The limits of the Super2 project are from IH 10 to 0.18 mile north of Crescent St. in Gorman (a length of 17.2 miles). The Gorman urban project runs from 0.18 mile north of Crescent St. to the Comanche County Line (a length of 1.3 miles). Super 2 design included passing lane design, cross-culvert and parallel drainage safety improvements. In the urban section of the project, responsibilities include preliminary design for public presentations and PS&E design of all roadway reconstruction elements including storm sewer, illumination, flashing beacon, pedestrian accommodations, signing and striping.
FM 3338, Webb County - TxDOT Laredo District
Prime Provider – This PS&E project consists of the rehabilitation of existing FM 3338 in Webb County from FM 1472 to SH 255, approximately 8.195 miles, in order to accommodate increased truck traffic and load limits. Project included roadway and traffic design, extending culverts, construction phasing and TCP, SW3P, utility coordination and preparation of PS&E documents.
FM 1110 (Phase 1), El Paso County - Jacobs/TxDOT El Paso District
Project Task Leader (Erosion Control) – Existing FM 1110 in El Paso County is to be upgraded from a two-lane rural facility to a four-lane urban roadway between IH 10 and FM 76 (approx. 1.1 miles). Specific tasks for this project included development of PS&E for a complete erosion control plan.
US 84 Widening and Reconstruction, Cherokee and Rusk Counties - TXDOT Tyler District
Prime Provider – This contract contained two separate PS&E packages. One for grading, structures, base repair and widening in Cherokee County and one for full reconstruction and widening of the road base and structures of US 84 in Rusk County. The limits of the Cherokee County project are from 0.43 mile east of SH 110 to the Rusk County Line in Reklaw (a length of 9.33 miles). The Rusk County project runs from FM 225 to approximately 2.34 mile west of FM 3055 (CR 3155) (a length of 4.525 miles). Existing US 84 is only 24 ft. wide (11 ft. lanes and 1 ft. shoulders) in rolling terrain. Plans were developed to widen to a 28 ft. roadway in order to provide 3 ft. shoulders and an improved ride. All existing structures (including driveway culverts) were widened and/or replaced as necessary and safety end treated. Traffic control plans for phased construction were developed, pavement marking and signing plans were prepared and quantities and cost estimates were calculated.
RM 2243 at Escalera Parkway, Williamson County – Williamson County
This intersection improvement project, located within the Edwards Aquifer Recharge Zone, includes engineering services required for preliminary studies, plan preparation and construction support. Initially, a traffic study will be conducted and a traffic analysis and summary report of alternatives to improve operations/safety at the intersection will be prepared. This report will present a preferred engineering alternative as well as a signal warrant study if needed. Next, survey, geotechnical, environmental and design services will be used to further develop the preferred alternative, coordinate proposed improvements with TxDOT, TCEQ and other agencies, and prepare a complete PS&E package to be put out to bid. After providing bid phase assistance, construction support in the form of responses to contractor requests for information and shop drawing review will be provided.
Georgetown Inner Loop at Wilco Way, Williamson County
Signing, pavement markings and erosion control – This 1.2-mile intersection and roadway improvement project, located within the Edwards Aquifer Recharge Zone, includes engineering services required for preliminary studies, plan preparation and construction support. Design tasks for this project including development of PS&E for all required roadway signing and pavement markings as well a complete erosion control plan for the project.
Main Street Improvement Project, Williamson County – City of Round Rock
Known as the 411 Main Project, this consisted of the extension of San Saba Street for a half-block to provide parking, sidewalks, streetlights, landscaping and other aesthetic features as part of improvements in downtown Round Rock. The proposed improvements included the design of ADA elements and design of a winding access driveway into a proposed commercial development. Components of this PS&E project included grading, paving, sidewalks and ramps utilizing paver blocks, illumination, irrigation, signing and striping.
State Highway Access Coordination and Permit Request, Travis County – JLL Retail
Provided design services and coordination efforts with development engineers and TxDOT to secure approval for a turn lane and access driveway for the Shops at 685 development. Project included ROW dedication determinations, environmental documentation, utility identification and coordination for relocation efforts, roadway design, storm sewer design, traffic control plans and completed permit request with required information.
State Highway Access Coordination and Permit Request, Travis County – Greenview Development
Provided design services and coordination efforts with development engineers and TxDOT to secure approval for a turn lane and access driveway for the Manor Commons development.
Seton Parkway, Williamson County – Rodriguez Transportation Group/City of Round Rock
Signing, pavement markings and illumination – To provide for increased development in the NW Round Rock area, Seton Parkway is being improved and extended between University Blvd. and Avery-Nelson Pkwy. Within the project limits, a new east-west connection will also be designed to connect Seton Pkwy. with A.W. Grimes Blvd. Design tasks for this project including development of PS&E for all required roadway signing and pavement markings as well as complete design of continuous illumination for the project.
US 183, Caldwell County – CPY/TxDOT Austin District
Intersection details and erosion control – Located in Lockhart, this 2.02-mile improvement project will widen the existing four-lane undivided roadway to four lanes with a continuous left turn lane. Design tasks include curb and gutter, storm sewer, intersection/signal design, safety lighting and pedestrian elements. Specific responsibilities under this project included the production of project layouts, creation of intersection detail sheets and design and detailing of erosion control measures.
University Blvd., Williamson County – Williamson County
This 3.4-mile project is situated between two major, State maintained roadways; FM 1460 and SH 130. The work performed consists of providing engineering services required for the preparation of PS&E for the addition of lanes and shoulders to an existing two-lane roadway to create a predominantly four-lane divided facility. Preparation of plans, details and quantities include roadway design, grading, paving, drainage, signing, pavement markings, signals, traffic control plans and construction cost opinions for the proposed west bound lanes and the overlay of the existing east bound lanes. This is a County sponsored project, but all work required coordination with TxDOT and the City of Round Rock.
IH 35 Ramp Reversals, Williamson County – CPY/City of Round Rock
Large signs – This project entails the reversal of the existing ramp patterns along IH35 between FM3406 (Old Settlers Blvd.) and US79 (Palm Valley/Sam Bass Road) to increase economic development. Improvements will better accommodate access to the increasing number of businesses along the frontage roads. The IH35 ramp relocation project brings a unique set of project requirements and challenges. Being part of the Federal Highway System and being located in an important growth and mobility corridor, project components must be dissected on multiple levels. Alternatives studied balanced access needs not only for the interstate system but also for the many local businesses; all while maximizing safety. Specific responsibilities on this project included general roadway design support and the design and detailing of guide signs and sign structures.
Gattis School Road Turn Lane, Williamson County – City of Round Rock
This project consisted of the widening of Gattis School Road from west of Rolling Ridge Drive to west of Via Sonoma Trail (0.5 mile). The proposed improvements include curb removals, sidewalk relocation and re-striping to accommodate the addition of a two-way left turn lane for local access. Components of this PS&E project included grading, paving, sidewalks, storm sewer revisions, signing and striping.
FM 3406, Williamson County – CPY/City of Round Rock
Signing and pavement markings – Tagged as a safety improvement project, the FM 3406 improvements will widen the existing pavement intermittently from Sam Bass Road to North Mays Street to provide left- and right-turn lanes at key intersections. Specific responsibilities on this project include all necessary engineering and technical services for the completion of signing and striping plans for the project.
Quinlan Park Road, Travis County – RW Armstrong/Travis County
Drainage – Quinlan Park Road, located in Travis County’s Precinct 3, is a two-lane rural roadway with left turn bays at Bella Mar Trail and Tierra Grande Trail. This project will widen Quinlan Park Road in front of River Ridge Elementary School to provide a continuous left turn lane throughout the project limits, a distance of approximately 1800’. Specific project related responsibilities include drainage area boundaries and hydrologic calculations for existing and proposed conditions, determination of Total Suspended Solids removal and preparation of a hydraulic report summarizing methodology used in all analyses.
Greenlawn at Gattis School Road Intersection Improvements, Williamson County – City of Round Rock
This project consisted of the reconfiguration of the north and south approaches of Greenlawn Blvd. at Gattis School Road. The proposed improvements include median and striping removals to accommodate the addition of dedicated left turn lanes for both approaches. Additionally, revisions to curb lines and lane configurations on the south approach were made to accommodate a hike/bike trail for inclusion in an existing system.
Mager Lane Improvement Project, Hutto, Williamson County – City of Hutto
The limits of design for Mager Lane improvements are from FM 1660 to the east City Limits of Hutto. With current and projected land use being predominantly mid-density residential and commercial, this two-lane rural roadway needs to be upgraded to provide for future growth and traffic demands. Additionally, because Mager is a key school route to Hutto Elementary from Clark’s Crossing, Carol Meadows and other nearby subdivisions, this section of roadway has been identified as the number one priority in Hutto’s 2010 Pedestrian Mobility Plan. The proposed section for this project is a three-lane urban facility with underground storm sewer and sidewalks. A right turn lane into the school will also be designed to ease congestion during morning drop-off and afternoon pick-up periods. Project elements included right of way acquisition, utility coordination and adjustments, pavement design, storm sewer design, floodplain mapping and revisions, culvert design and channel improvements as well as normal roadway design tasks.
Shops at Arbor Walk Access Improvements, Austin, Travis County – Simon Property Group / TxDOT Austin District
This shopping area along the Loop 1 (Mopac Expressway) near US 183 in Travis County created congestion issues on the northbound frontage road due to patron traffic at the center’s access points. As a joint effort between TxDOT, the City of Austin and the developer, frontage road improvements including widening and re-striping to create acceleration and right turn only lanes for the shop’s access driveways were designed. Tasks include geometric layouts, roadway design, drainage design and striping plans compatible with the existing frontage road and meeting all TxDOT design requirements.
LBJ Express Project, Dallas, Dallas County – Trinity Infrastructure
The LBJ Express project incorporates dramatic improvements to Interstate 635 and Interstate 35E in Dallas County. This innovative project features rebuilt main lanes, a continuous frontage road system, and 13 miles of new express managed toll lanes. SLG managed traffic data collection and traffic modeling efforts to build and validate an existing conditions Synchro model to be used for additional services. These additional services include (1) claim assessments to collect new and analyze new traffic data as necessary to determine whether damages were incurred as a result of construction activity, (2) intersection traffic analysis to assess the effects of temporary closures of transverse intersecting roadways along the project, and (3) traffic management plan analysis in order to study and propose alternatives for potential cost or time savings for different traffic management strategies.
LP 1604 / US 281 Interchange Pedestrian Bridges, San Antonio, Bexar County
This intersection ranked as the most accident-prone intersection in San Antonio and Bexar County for a number of years because of the stop and go traffic and the sheer volume of cars trying to access US 281 and/or Loop 1604. The solution; four non-toll direct connectors linking US 281 and Loop 1604. SLG took on PS&E development for two pedestrian bridges over US 281 at the interchange with LP 1604. Initial tasks included design reviews including utility conflict determinations and an overall compatibility review of proposed improvements within an existing interchange reconstruction project. Plan sheets were developed for the proposed bridges, drainage improvements, traffic control and all other associated design elements. Plan preparation also included quantity summaries and incorporation of applicable specifications, notes and standards.
IH 35 Reconstruction, McLennan County – TxDOT Waco District
IH 35 is being expanded from four to six lanes from the Williamson County line to just north of Hillsboro. The project will be financed through Proposition 12 and Proposition 14 funds and the American Recovery and Reinvestment Act. SLG provided Quality Control services for Segment 3 by reviewing and commenting on the extensive traffic control plans being developed for this project. SLG also provided drainage design services for temporary structures needed to maintain project drainage through various phases of construction.