This issue provides guidelines to help in the justification, design, and analysis of auxiliary through lanes (ATLs) at signalized intersections. ATLs are lanes for through movements that begin upstream of a signalized intersection and end downstream of the intersection. ATLs are potentially a moderate-cost approach to increase intersection and overall corridor capacity. A report that describes the research related to the development of NCHRP Report 707 has been released as NCHRP Web-Only Document 178: Assessment of Auxiliary Through Lanes at Signalized Intersections at http://www.trb.org/main/blurbs/166521.aspx. A spreadsheet-based computational engine is also available online at http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP03-98_CombinedComp…. (Author/publisher)
Abstract