UPDATE @ 2:50 P.M.
The Norman Police Department updated their Facebook post, announcing that the railroad crossings at Duffy, Boyd, Brooks and Lindsey Street are back open to all motorists and pedestrians.

ORIGINAL STORY
NORMAN, Okla. (KFOR) — The Norman Police Department have closed the railroad crossings at Duffy, Boyd, Brooks and Lindsey Street to traffic at around 1:30 p.m. Saturday following a non-injury accident involving a car and a train.
These crossings are located east of Oklahoma Memorial Stadium. The closures may cause delays for those planning to travel east while leaving the OU-Arkansas State football game.

Police are advising pedestrians to avoid walking over or near the train.