a train traveling down a track under a bridge a train is coming down the tracks under a bridge a train traveling under a bridge on a track a train traveling down a track under a bridge a train is coming down the tracks under a bridge a train is traveling down the tracks under a bridge a train is traveling down the tracks under a bridge a train traveling down a track under a bridge a train is coming down the tracks under a bridge a train is coming down the tracks under a bridge a train traveling under a bridge on a track a train is coming down the tracks under a bridge a train traveling under a bridge with a tunnel a train traveling down a track under a bridge a train is traveling down the tracks under a bridge a train is traveling down the tracks under a bridge a train is traveling down the tracks under a bridge a train is traveling down the tracks under a bridge a train traveling down a track under a bridge a train is traveling down the tracks under a bridge a train is coming down the tracks under a bridge a train traveling down a track under a bridge a train is traveling down the tracks under a bridge a train traveling down a track under a bridge a train traveling under a bridge on a track a train traveling under a bridge on a track a train is coming down the tracks under a bridge a train is traveling down the tracks under a bridge a train traveling under a bridge with a train car on the tracks a train is traveling down the tracks under a bridge
a train getting ready to go into a tunnel  there is a train that is about to go through a tunnel  A red and black train driving through a bridge tunnel.  A train leaving a tunnel passing another train  Two trains are passing each other through a tunnel.