MMM is providing engineering services for the design of a 3,600-foot bridge (B645), two 650-foot bikeway structures, and 3,600 LF of special design retaining walls. The new bridge will tie into the existing West Norfolk Bridge and spans the Western Branch of the Elizabeth River.

Geometrically, the new bridge begins as two separate structures. The eastbound and westbound structures begin with four travel lanes and transition to three travel lanes. The two separate structures merge to the typical combined cross-section and maintain this cross-section until it ties into the existing bridge. The bridge carries two travel lanes in each direction. Approximately 1,900 LF of the bridge is on a horizontal curve with a radius of 1,146 feet. The balance – or 1,612 LF – is on a tangent alignment. The horizontally curved portion of the bridge is typically superelevated at four percent transitioning to a normal crown in the tangent segments and to a two percent superelevation where it ties into the existing bridge.

> Corridor and alignment studies
> Public hearing
> Survey of existing bridge geometrics
> Land and hydrographic study
> Geotechnical investigation
> Bridge structure selection study (conceptual design)
> Right-of-way acquisition
> Cost estimation
> Construction drawings and specifications, with related cost estimations