2 Injured in Crash on SR-99 in Modesto, CA

Emergency units were sent to the roadway shortly after 5:35 p.m. Additional reports indicated traffic had come to a complete stop in all lanes as the situation unfolded. Later updates suggested that as many as three or four vehicles may have been involved, although that information had not been confirmed. At least two people were reported hurt.

The cause of the crash remains under investigation as more information becomes available.

We hope those affected make a full and speedy recovery.

Why Traffic Can Back Up Quickly After a Multi-Vehicle Highway Crash

Collisions involving several vehicles on busy highways usually create major traffic delays within minutes. Even when only one lane is blocked, drivers slowing to avoid the damaged vehicles can cause congestion to spread far behind the original point of the crash. If additional lanes become blocked or emergency crews need space to work, traffic may come to a complete stop.

Early reports following a highway collision are usually limited and may change as investigators gather more information. Initial dispatch logs can include preliminary observations that are later updated or corrected. Details such as the number of vehicles involved, the extent of injuries, and the sequence of the collision are typically confirmed only after the investigation has progressed.