AURORA, Colo. — A semitruck and an RTD commuter train on the A Line crashed on Monday around 9:21 a.m., according to the Aurora Police Department (APD).
All of the eastbound and westbound lanes of Smith Road are closed east of Sable Boulevard, APD said. The northbound lanes of Sable Boulevard are also closed at the train tracks.
Drivers should expect significant delays, and APD advised using Chambers Road and Peoria Street as alternative routes.
Shuttle buses will replace the A Line service from Central Park Station to 40th Ave. and Airport Boulevard at the Gateway Station, RTD said.
#APDTrafficAlert: All of the eastbound and westbound lanes of Smith Road are closed east of Sable Boulevard for a train vs. semi crash. The northbound lanes of Sable Boulevard are also closed at the train tracks.
— Aurora Police Dept (@AuroraPD) August 4, 2025
There is a large first responder presence in the area and… pic.twitter.com/8PXybFsADf
There were 55 people on board the A Line train at the time of the crash, headed to Denver International Airport, according to APD. The Aurora Fire Department helped evacuate the passengers.
The train operator was taken to the hospital for injuries from broken glass. Three people riding the train sustained minor injuries, APD said. Medical personnel evaluated two adults, and one man was taken to the hospital as precaution. The driver of the semitruck was not injured.
UPDATE from Aurora PD on the situation where a train and semi collided:
— Jayson Luber (@Denver7Traffic) August 4, 2025
Southbound and northbound Sable Boulevard are closed on either side of the train tracks, in addition to the full closure of Smith Road. There is significant damage to rail crossing safety equipment, which… pic.twitter.com/XYwC2i6jZF
There is significant damage to the rail crossing safety equipment and debris in the road, according to Aurora police, which will cause an extended road closure. There's no estimated time for the road to reopen.
Circumstances leading up to the crash are under investigation, APD said. The semitruck driver told police was waiting for northbound traffic to finish traveling through the intersection before he made a left-hand turn on Smith Road. When he did make the turn, the semitruck driver told police the RTD A-Line train struck him.
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