Why did the trailer hit me when the front of the truck looked clear?

The trailer’s wheels often follow a tighter path than the cab. On a right turn, some drivers also move left first, which can open a gap along the curb. The starting questions are the truck’s path, the signal, and whether the space beside the trailer was clear.

Does Oklahoma let a truck swing wide to make a right turn?

Oklahoma requires a right turn “as close as practicable” to the right-hand curb, and no driver may move right or left until it can be done with reasonable safety (47 O.S. §§11-601, 11-604). A long trailer may need room. The driver still has to check that the space beside the truck is clear.

Wide-Turn Truck Crash Lawyer Oklahoma

A semi does not turn the way a car does. The trailer can swing out or cut inside the path of the cab and hit a car, motorcycle, or person who looked clear of the tractor. The starting questions are simple: where the truck was as it entered the turn, whether the driver signaled, and whether the space beside the trailer was actually clear. This page is about those crashes, statewide. It is not a lane-change sideswipe page.

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Wide-Turn and Squeeze Truck Crashes in Oklahoma

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What a squeeze or wide-turn crash looks like

On a right turn, the trailer’s wheels often follow a tighter path than the tractor. Some drivers move left first to make room, which can open a gap along the curb. A car, motorcycle, bicycle, or pedestrian in that gap can be struck as the trailer comes back through the turn. The same geometry can happen on a left turn or a driveway.

What Oklahoma turning and signal rules require

Oklahoma law says both the approach for a right turn and the right turn itself shall be made “as close as practicable to the right-hand curb or edge of the roadway” (47 O.S. §11-601(1)). A local marker or sign may require a different course at a particular intersection (§11-601(3)). No one may turn at an intersection, a public or private road, or a driveway unless the vehicle is in the proper position, or move right or left on a roadway “unless and until such movement can be made with reasonable safety” (47 O.S. §11-604(A)). A signal of intention to turn right or left “shall be given continuously during not less than the last one hundred (100) feet traveled by the vehicle before turning” (§11-604(B)).

“As close as practicable” leaves room for a long vehicle that cannot physically turn from the curb lane. It does not remove the duty to make the movement with reasonable safety, or to signal. Whether a given swing-wide turn was lawful depends on the intersection, any signs, the signal, and whether the space beside the truck was checked. That is a fact question in the particular case.

The records that show the path

Intersection or business-camera video, the truck’s own cameras, damage on both vehicles, tire marks, and engine or signal data — where those systems record a signal — can show how the tractor and the trailer moved. Those records should be preserved promptly. See evidence preservation and building a truck-crash investigation. A side underride during a turn is a different hardware question; that belongs on the truck underride page.

If the wreck was on an interstate ramp or an interstate highway, the crash report may come from the Highway Patrol or from another agency named on your paperwork. Oklahoma Highway Patrol has primary authority over traffic offenses on interstate highways. State law directs OHP "To investigate and report traffic collisions on all interstate and defense highways and on all highways outside of incorporated municipalities" (47 O.S. § 2-117(B)(10)). A formal Attorney General opinion issued August 27, 2025 (2025 OK AG 11) says the authority of sheriffs and municipal police on those roads is supplemental. Check the agency named on your paperwork.

Related reading: the truck accident hub, what to do after the crash, and the Oklahoma truck-accident law guide.