Hundreds of drivers were stranded in the Third Street Tunnel during rush hour Wednesday evening after a truck spilled cement on the roadway.
All northbound lanes of Third Street Tunnel were blocked for about two hours as workers tried to clear up the mess.
Northwest D.C. commuter Kathleen Lewis sat in her car for nearly two hours with her infant son.
"It was frustrating. It was hot. We turned the car off because we had been sitting there a long time," she said Wednesday night. "We were just trying to wait it out."
Cars stuck in the tunnel had been cleared as of about 7:30 p.m. but the closure remained, police said. The roadway had reopened by 8:15 p.m.
No information on the cause of the spill was immediately available.
Lewis said she might ditch her car on Thursday.
"Maybe I'll take the Metro tomorrow," she said.