A minimum of two through lanes in each direction are maintained for traffic on Grand Concourse to facilitate roadway work by NYCDOT Bridges. Motorists should expect delays and consider alternate routes. The East 161st Street underpass and inner roadway was closed between River Avenue and Sheridan Avenue on October 26, 2006 until April 1, 2007. The outer roadways on East 161st Street will accommodate traffic. Also no left turns from East 161st Street onto the Grand Concourse are permitted. Motorists should follow posted detour for access onto the Grand Concourse.