A crash on Interstate 45 caused hours-long gridlock across the Galveston Causeway and onto Galveston Island on Wednesday evening
The crash involving one car happened on the northbound side of Interstate 45 south of the Texas City Wye about 3:45 p.m.
The car appeared to have flipped after hitting the barrier in the middle of the highway, Galveston County Sheriff Henry Trochesset said.
It had been traveling north on the feeder road but cut across a grass median and over four lanes of traffic before hitting the wall, Trochesset said.
There were two people in the car during the crash, Trochesset said. They were both taken away from the scene by ambulance in critical condition, he said. Emergency responders had originally considered calling a helicopter to transport a patietn, but later changed plans, he said.
The roadway was shut down for hours as investigators analyzed the scene. The Texas Department of Public Safety was investigating whether alcohol was a factor in the crash, Trochesset said.
The investigation shut down all three lanes of the highway, causing traffic to be diverted down a two-lane feeder road.
Traffic on on the outbound side of the causeway was backed up for miles long after the crash. At some points, the jam was as far back as 45th Street in Galveston, more than 40 city blocks from the start of the causeway.
The highway was cleared by 7:30 p.m., but traffic was still clearing from the island at that time.