1 Injured in Truck Accident on Colorado Boulevard in Denver, CO

Denver, CO — March 21, 2025, one person was injured in a truck accident at about 3:30 p.m. on Colorado Boulevard at East 9th Avenue.

Authorities said a vehicle crashed into a semi-truck while heading south of Colorado Boulevard.

One person suffered undisclosed injuries in the crash, according to authorities.

Authorities have not released any additional information about the crash at this time. The accident is still under investigation.

Commentary by Attorney Michael Grossman

Crashes involving passenger vehicles and semi-trucks in urban intersections like Colorado Boulevard and East 9th Avenue often come down to split-second decisions and limited room for error. When a smaller vehicle collides with a semi-truck in this kind of setting, several questions immediately arise: Who had the right of way? Was the truck making a wide turn? Was the passenger vehicle trying to beat the light? These are the details that matter, not just for assigning fault, but for understanding how crashes like this happen in the first place.

One critical factor in city intersections is visibility. Semi-trucks have large blind spots and need extra space to maneuver, especially when turning through tight intersections. If the truck was in the middle of a turn or lane change, the driver of the smaller vehicle may not have had a clear line of sight or may have tried to slip through a space that simply wasn’t there. On the other hand, if the passenger vehicle misjudged the truck’s speed or failed to yield, that can also quickly lead to a serious collision.

Speed and signal timing should also be evaluated. Was the truck proceeding on a green light? Was the passenger vehicle trying to clear the intersection during a yellow or red? In urban environments, traffic signal timing plays a huge role in how safe or chaotic an intersection feels, and even minor misjudgments can result in major consequences when a fully loaded semi is involved.

At this point, the facts are still emerging, but if investigators limit their analysis to who hit whom without asking deeper questions — about timing, visibility and vehicle behavior — they risk overlooking key factors that contribute to intersection crashes. A complete investigation should consider whether infrastructure, driver error or vehicle limitations played the biggest role.