SIOUX CITY, Iowa (KCAU) – Police are warning to be aware of your surroundings after a motorcycle accident sent two people to the hospital, causing a traffic jam on the Gordon Drive viaduct.

Sioux City Police were alerted about the crash on the Gordon Drive viaduct around 5:30 p.m. Thursday. According to police, a motorcycle with two passengers traveling east was weaving in and out of traffic. The motorcycle struck another vehicle and then crossed the center lane into oncoming traffic, hitting another vehicle.

Police are still investigating but are warning folks to be vigilant when sharing the road with motorcycles.

“Make sure you can see all around the front of your vehicle, behind your vehicle, check your mirrors frequently and scan your mirrors as you’re driving. Make sure you have space to the left and right if you need to make evasive maneuvers. If you see somebody driving crazy like that, always slow your own speed, give them plenty of room and space, get out of their way. If you should encounter what you think is a drunk driver, give that person wide space. Get out of the way if you can,” said Sgt. Ryan Bertrand of the SCPD.

Both the driver and passenger of the motorcycle were taken to the hospital. Police say the driver appeared to be seriously injured while the passenger received medical care at the scene.