These accidents happen a lot. Here’s the rule for vehicles entering the highway from a private road:
The driver of a vehicle about to enter or cross a highway from a private road or driveway shall yield the right-of-way to all vehicles lawfully approaching on said highway.
And here’s another example of what happens particularly when a truck doesn’t yield to a motorcycle:
A Rochester man sustained serious injuries in a Friday morning crash that required him to be airlifted to Harborview Medical Center in Seattle.
Scott R. Bliss, 44, was injured when the 2007 Harley-Davidson motorcycle he was riding on collided with a dump truck on the Harrison Avenue northbound onramp to Interstate 5 in Centralia.
According to a Washington State Patrol incident report, Bliss was on the on-ramp to northbound I-5 when a 2004 Mack dump truck with a trailer driven by Wesley G. Snelson, 61, of Galvin, turned onto the on-ramp from a construction site. The motorcycle then hit the trailer, ejecting Bliss.
In addition to the driver’s negligence, sometimes there are also claims against the landowner (if the landowner created an obstruction that made it difficult for exiting drivers to see oncoming pedestrians or vehicles. (These claims usually become important where the driver doesn’t have enough insurance–it’s likely that the driver of the dump truck will be covered by a commercial policy with at least $1M in coverage so it’s basically a theoretical issue in terms of this accident.)