Intersection Improvements

Halfway Boulevard at Massey Boulevard Intersection Improvements

Washington County Division of Public Works

In cooperation with the Washington County Division of Public Works, BAI developed complete construction plans, specifications and cost estimates to relieve congestion and improve safety and operations at this congested intersection. 

Initially, BAI provided travel forecasting for study-year growth, including potential commercial facilities, turning volumes, lane configurations and alternative improvement options.  Upon completion of the traffic and transportation analysis, BAI prepared design documents for the improvements, which included the intersection and nearly one-mile of roadway approach alignment. 

 BAI’s design services included horizontal and vertical alignments, pavement widening and relocation, intersection geometry (involving WB-67 truck movement) overlay and pavement reconstruction. The design also included ADA compliance, safety grading and APS signals. The project also included detailed open and closed drainage system modifications and relocations, culvert extension and MDE permitting.

To facilitate the roadway widening, BAI was responsible for commercial access and entrance relocations, coordination with owners, and public presentations. For phased construction of the improvements, BAI developed complete traffic control plans for each portion of roadway improvements, including temporary traffic signal operation. Final traffic signal plans, highway signing and lighting, and pavement marking plans were developed by BAI.

US Route 40 at Mt. Aetna Drive Intersection Improvements

Washington County Division of Public Works
BAI was responsible for preparing complete construction plans, specifications and cost estimates to relieve congestion and improve safety at the intersection of US Route 40 and Mt. Aetna Drive in Hagerstown, Maryland. The project included reviews and approvals from both the Washington County Division of Public Works and various Maryland State Highway Administration divisions.

The project involved initial traffic engineering analysis, including Synchro/SimTraffic modeling and simulation, vehicle queue determination, signal timing and phasing, capacity projections, level-of-service, and safety evaluations.  Upon completion of the traffic engineering study, BAI prepared preliminary and final engineering construction documents.

 The engineering design involved auxiliary lanes along both US 40 and Mt. Aetna, safety grading and drainage, determination of right-of-way acquisition, stormwater management design, erosion and sediment control, full-depth pavement widening and resurfacing, horizontal and vertical re-alignment, sidewalks and ADA compliant curb ramps, and a new closed drainage system to tie into an existing system.  BAI was responsible for detailed construction documents for two new traffic signals and ADA signals, for the project.  BAI’s design also incorporated multiple stages of construction in order to maintain vehicle and pedestrian access during construction.

US Route 50 at Tilghman Road Intersection Improvements

Maryland State Highway Administration, District 1 Office

On a six month accelerated completion schedule, BAI was responsible for preparing complete construction plans, specifications and cost estimates to relieve congestion and improve safety at the intersection of US Route 50 Business and Tilghman Road in Salisbury, Maryland.

Initially, BAI was to provide traffic signal design services at the intersection. However, based upon BAI’s field observations of the site, traffic operations, patterns and safety concerns, BAI recommended to the Maryland State Highway Administration that geometric modifications were warranted to improve the overall safety and operation at the intersection.  

BAI prepared preliminary and final engineering construction documents for the project which included horizontal and vertical roadway realignment, safety grading and drainage, determination of right-of-way needs, stormwater management design, erosion and sediment control, full-depth pavement widening and resurfacing, sidewalks and ADA compliant curb ramps, and closed drainage system modifications.