Interstate 95 has rest stops in Darien both for the southbound and northbound lanes. The state Department of Transportation has added "speed change" lanes between entrances and exits up to Exit 10 (and points westward). The phase of the highway widening from Exit 9 to Exit 10, at a cost of $7.5 million, was expected to be complete by October 2007, state Transportation officials said in August of that year. The state is in the process of planning more such lanes through the rest of the highway in town in a project expected to cost $24.5 million. About 150,000 vehicles pass Exit 12 each day, according to the state Department of Transportation. The state was closed the southbound entrance for Exit 12 in 2008 during work on the project.