Martin Luther King Boulevard (Harrison Bridge) over Vine Street & Meyers Building Pedestrian Bridge
- Project Owner: Kentucky Transportation Cabinet
- Location: Fayette County, KY
Martin Luther King Boulevard is a major thorough-fare for north-south traffic in downtown Lexington. The existing structure had severely deteriorated structurally and inadequate geometrically. The City of Lexington chose to replace the bridge in coordination with construction of a municipal parking garage and bus transfer station (designed by others). The project also included a realignment of M.L. King Boulevard at the intersection with Main Street. This realignment required retaining walls and a pedestrian bridge at the parking garage entrance of the Meyers Building at the northwest corner of the intersection.
J.M. Crawford & Associates designed and prepared the structure plans for this project. Coordinating the bridge with the proposed parking garage both structurally and aesthetically and avoiding numerous buildings and structures were prime considerations. An existing box culvert paralleling the north approach embankment had to be rebuilt to carry the new embankment and a mechanically stabilized earth wall throughout its length. Precast architectural fascia panels were designed to match those proposed for the garage and special railing was designed to enhance the appearance of the bridge while functioning as vehicular railing.
The firm had to conduct an extensive study of span arrangements in order to miss the existing utilities and span existing streets and parking garage while maintaining vertical clearance requirements.
The M.L. King Boulevard Bridge begins at High Street and is a seven-span 62’-62’-54’-50’-74’-56’-79’ Prestressed Spread Box Beam structure. The deck carries three lanes with sidewalks for a total width of 55’. The north abutment cantilevers over the rebuilt box culvert and the north approach embankment is flanked by MSE retaining walls which extend from the end of the bridge to Main Street. The pedestrian bridge spans approximately 21’ between curved retaining walls which parallel the entrance to an underground parking garage.
All structure plans were designed to comply with the Kentucky Transportation Cabinet’s Standards.