The Carroll Street crossing in Carroll will be closed briefly this (Wednesday) afternoon while Union Pacific’s historic Big Boy steam engine makes a brief stop at the Carroll Depot. Authorities say the crossing will be impassible between 12:30 p.m. to 1 p.m. while the train is at the station. Those times are subject to change based on the engine’s arrival and departure times. Motorists are advised to use alternate routes to avoid potential delays.