As a result of a corridor study of Airline Highway, a troublesome area with major traffic flow issues, ABMB introduced a new and innovative traffic engineering solution to the Baton Rouge area. To reduce congestion at the intersection of Airline and Siegen, the firm designed a Continuous Flow Intersection (CFI). This method of design involves crossing left turning traffic to the opposite side of the roadway several hundred feet before the main intersection, thereby removing left turns from the main intersection and reducing signal phases. After developing the concept and presenting it to LADOTD, ABMB completed all traffic and alternative studies and a Stage 0 analysis and investigation. The firm developed final design plans and construction documents including geometrics, striping, cost estimates, wiring, signal phasing and timing. In addition, ABMB conducted numerous public meetings for the project and coordinated with LADOTD, the City of Baton Rouge and FHWA.
The intersection opened to rave reviews in March 2006, and has since spurred a statewide evaluation to locate other intersections that might also be improved with this concept.