Right-turn squeeze crashes occur when a large commercial truck swings left before executing a right turn, creating a gap that a cyclist or motorcyclist moves into, then closes that gap as the truck completes the turn and crushes the rider against the curb, a parked vehicle, or the intersection's corner. The physics are predictable, the regulatory framework is clear, and the resulting injuries are almost always catastrophic. Plaintiff counsel who understand off-tracking before the first deposition will have a significant advantage over carriers whose standard defense is that the cyclist was in the driver's blind spot.
Understanding Off-Tracking
Off-tracking is the phenomenon by which a trailer's rear wheels follow a path inside the arc traced by the tractor's front wheels during a turn. On a right turn, the trailer's rear swings toward the right curb on a line that is significantly inside the front wheels' turning radius. A standard 53-foot trailer can off-track as much as 18 to 20 feet on a sharp right turn. A cyclist riding in the bike lane to the right of the truck, or a motorcyclist holding position as the truck appeared to swing left before turning, is directly in the path of the off-tracking rear wheels and trailer body.
The squeeze mechanism: the truck driver, intending to turn right at a corner, initially steers the tractor left to give the trailer enough radius to complete the turn without mounting the curb. A cyclist or motorcyclist who observes the truck moving left may interpret this as the truck changing lanes or yielding space, and moves forward into the right-side gap. When the truck then turns right, the trailer's rear wheels follow the inside arc into the cyclist's position. The driver may never have seen the rider in the right mirror, and the trailer's swing may have been entirely in the trailer's blind zone.
Regulatory Framework and Breach
Commercial truck drivers are trained on off-tracking and are expected to account for it before initiating a right turn at an intersection. The duty to check mirrors before executing a turn, to clear the lane to the right before the turn begins, and to observe bicycle lanes and pedestrian traffic at the intersection before committing to the turn are all components of professional driver training and are addressed in FMCSA driver's manual guidance and carrier internal safety programs.
In jurisdictions with designated bicycle lanes, the truck driver's obligation to yield to or clear the bike lane before encroaching creates a specific statutory duty. Many state vehicle codes require that a vehicle turning right must first move into the right-most available lane before initiating the turn, rather than swinging left from a middle lane. Where the truck driver failed to position the tractor in the right lane before turning, the left-swing maneuver itself was a violation that created the squeeze zone. This lane-discipline failure is often visible in intersection camera footage or can be reconstructed from the GPS breadcrumb data showing the truck's path in the block before the intersection.
Evidence to Secure Immediately
In right-turn squeeze cases, the physical evidence has a short preservation window. A spoliation letter to the carrier within 24 hours of the crash should demand preservation of the following:
- The truck's event data recorder (black box) capturing speed, braking, and steering inputs in the seconds before the crash
- All forward-facing and side-mirror dashcam footage from the tractor and any trailer-mounted cameras
- The GPS route data showing the truck's path through the block leading to the intersection
- The driver's pre-trip inspection records, confirming that all mirrors were adjusted and functional
- Post-crash mirror position photographs, taken before anyone adjusts or realigns the mirrors
- The carrier's training records on right-turn technique and off-tracking awareness
Intersection camera footage from the municipality, businesses at the corner, and any nearby traffic management systems must be obtained by subpoena within days of the crash. Most city and county traffic camera systems overwrite footage on a 30-day or shorter cycle. For more on truck case discovery in trucking and motorcycle litigation, the same preservation-letter framework applies to all commercial vehicle crashes.
The Comparative Fault Defense and How to Counter It
Carriers routinely assert that the cyclist was contributorily negligent for: (1) positioning in the driver's blind spot, (2) advancing into the gap as the truck swung left, or (3) failing to observe the truck's turn signal. Each defense requires specific rebuttal.
Counter the blind-spot defense with evidence that the truck's mirrors were adjustable and should have covered the right side of the vehicle at the cyclist's position, and with expert testimony on the minimum mirror field of view required under Federal Motor Carrier Safety Regulations Part 393.80. A properly adjusted mirror system for a commercial vehicle should eliminate or substantially reduce the right-side blind zone at intersection distances. If the driver had an unobstructed mirror view of the rider's position, the blind-spot defense fails on the merits.
Counter the gap-advance defense with dashcam footage and witness testimony about the truck's movement and signaling before the turn. If the truck did not signal, or if the signal was obscured by the truck's own bulk, the cyclist's advance into the gap was reasonable. In many states, a cyclist in a designated bike lane has a statutory right to the lane that the truck must yield before encroaching, regardless of blind spot claims.
The Wrongful Death Dimension
Right-turn squeeze crashes are among the most lethal crash types for cyclists and motorcyclists. The trailer's weight and the crushing geometry of the turn produce injuries that rarely leave survivors with the ability to reconstruct the event. In fatal cases, the evidence must speak for itself: the skid marks, the final rest positions of the truck and the rider, the GPS data, and the reconstruction expert's simulation of the off-tracking path. For the wrongful-death claims that follow, see the related coverage of wrongful-death damages structures and of auto accident insurance coverage for cyclists whose own UM/UIM or health coverage is relevant to the recovery.