BOSTON — A dog trotting through a busy Boston tunnel narrowly missed being hit by traffic before state police rescued the wrong-way rover.

Surveillance video from the Massachusetts Department of Transportation shows the black-and-white pup heading toward oncoming vehicles in the Ted Williams Tunnel on Thursday morning. With cars and trucks whizzing by, it moves from the middle of the lane to a side wall.

A later video shows six state police vehicles parked in a staggered formation and a trooper beckoning to the dog, which runs away from the officer but then hops into the back seat of a cruiser.

A message was left with state police Friday seeking further information.

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