Sidewalk Design

MD 808 After-typeMD 808 Sidewalk Improvements

Maryland State Highway Administration,
District 7 Office

BAI was responsible for developing conceptual alternative improvements and developing construction documents for 800 feet of sidewalks, curb ramps, and crosswalks along MD Route 808 (Main Street) in downtown Mt. Airy.

In order to make the sidewalk system safer, more accessible, and compliant with current Americans with Disabilities Act (ADA) requirements, BAI has provided a detailed assessment of Main Street in the heart of downtown Mt. Airy.  Conceptual alternatives development included: Ornamental fencing along the higher sidewalk for safety/aesthetic purposes; Conversion of Park Avenue from two-way to one-way operation to improve safety; traffic circulation and obtain additional on-street parking to offset parking losses on Main Street, Reconfiguration of the Main Street crosswalk to improve sight distance; Widening and adding parking along Center Street, Adding drainage inlets/pipes to an existing system in order to improve recurring flooding conditions.

MD 464 Sidewalk Improvements

Maryland State Highway Administration, District 7 Office

BAI was responsible for developing design documents for the construction of a five-foot wide sidewalk along MD Route 464 (approximate distance 1,500 feet). BAI’s design involved the development of design plans, specifications and cost estimates and included horizontal and vertical alignments in compliance with ADA, AASHTO and State Highway Administration criteria, field investigations and site observations, topographic mapping and survey, identification and resolution of utility conflicts, roadway and sidewalk typical section, maintenance of traffic control plans, earthwork and safety grading, landscape retaining wall, erosion and sediment control and stormwater management requirements, lighting and signing/pavement marking design.

 MD 208 Sidewalk Improvements

City of Hyattsville Department of Public Works

Under the Maryland State Highway Administration’s Sidewalk Retrofit Program, the City of Hyattsville DPW is upgrading their existing sidewalk to meet SHA and ADA specifications.  BAI is responsible for improvements to approximately 400 feet of sidewalk along Hamilton Street (MD 208).  Also included in this project is the design of a retaining wall along a portion of the northbound shoulder along 38th Avenue (MD 208).

The goal of this project is to improve pedestrian safety and connectivity throughout the corridor, and to upgrade the sidewalk system to meet current ADA regulations.   BAI has provided engineering design services for the upgrades, successfully developing construction documents and projected estimates for construction costs for the project.   BAI managed the reviews, approval and coordination with the MD State Highway Administration District 3 Office, Prince George’s Department of Environmental Resources and the Prince George’s Soil Conservation District.