To realize the goals associated with Chattanooga’s Bike Network plan, Alta worked with the City to develop construction documents for Phase 1 of their protected bike lane implementation.
The first phase was constructed by Tennessee DOT with a Congestion Mitigation and Air Quality Improvement (CMAQ) grant. Alta designed protected bike lanes on Broad Street and a neighborhood greenway on Virginia Avenue (constructed with local funding).
For the CMAQ section of the project, Alta led the preliminary design and final construction documentation for over 6.5 miles of road diets, separated bike lanes, and 36 signal modifications. In addition to the design, a comprehensive traffic analysis was prepared to determine the impacts of the proposed road diets. The separated bike lanes will be constructed with pavement markings and flexible delineators. Other features of the design included mid-block crossing improvements, separated bike lane bus islands and ramps, drainage revisions, signing upgrades, and signal upgrades. As the project construction was funded through CMAQ, the project plans, estimate, and specifications were prepared to TDOT standards. The first section of the project, a 2.6-mile section along Willow Street and Orchard Knob Avenue should start construction in Summer of 2017.
The Broad Street section of the project was a 4,000-foot long road diet along Broad Street, Aquarium Way, and Chestnut Street to implement a pair of one-way separated bike lanes. The Alta team developed construction documents including the design of curb separated bike lanes, two traffic signal modifications, an RRFB, and signage and striping for the reconfiguration of Broad Street/Aquarium Way to accommodate the separated bike lanes. The Broad Street section of the project was completed in November 2015.
The Virginia Avenue section of the project developed construction documents for the 1.4 mile long Virginia Avenue Neighborhood Greenway in the St. Elmo neighborhood in Chattanooga. Virginia Avenue was designated as a corridor suitable for a neighborhood greenway as it carried little vehicular traffic and connected the residential neighborhood to the village district. The greenway will eventually connect with the next phase of the Chattanooga Riverwalk. Design elements included signing and pavement markings to designate the greenway, about 1,100 feet of full depth reconstruction, and the reconstruction of the St. Elmo Avenue at Ochs Highway intersection which included signal modifications and sidewalk upgrades. The project was constructed in 2015 and has seen increased usage by people walking and biking since its opening.