SR 907 (Alton Road) Reconstruction, 43rd Street to East of Allison Road

State Route 907 (Alton Road) is a four‐lane divided highway that runs north–south along Miami Beach’s Biscayne Bay coastline. The asphalt pavement on the 2.8‐mile stretch from 43rd Street to east of Allison Road is exhibiting substantial deterioration, in large part because the current roadway drainage system was designed when the sea levels in Biscayne Bay were lower than those prevailing today; water is therefore not draining efficiently from the site. Lochner is leading the design for a Florida Department of Transportation (FDOT) project that will reconstruct the roadway and, for the first time in Florida, install an entirely new roadway drainage system specifically designed to address rising sea levels.

Lochner’s design for this critical new drainage system is exclusively pump based with no gravity drainage elements. The roadway design plans will reconstruct the asphalt pavement across all four travel lanes, widen the existing parking lanes along most of the project to eight feet, and stripe for active transportation along the full project length. Lochner is designing all necessary improvements to sidewalks, curb ramps, and pedestrian signals to comply with current ADA requirements as well as various upgrades to the roadway lighting and traffic signals along the project to meet FDOT’s new design standards. Landscaping and irrigation plans for the roadway median will also be provided.

Alton Road is a main thoroughfare for commuters from North Beach, particularly for access to Highway A1A and Mount Sinai hospital. Lochner will develop a detailed construction phasing and maintenance‐of‐traffic plan for this project in close coordination with the designers of other Miami Beach construction projects, regional and local event organizers, Mount Sinai hospital, and first responders. The plan will include the phased closure of traffic lanes and sidewalks and an approved detour schedule. Access to residential and business driveways will also be maintained.

Lochner will also assist in the development of bilingual (English and Spanish) project information for distribution to affected stakeholders, particularly residents and business owners located along the route.