Two motorists turned a quiet stretch of highway on Maryland's Eastern Shore into a shooting gallery, pegging shots at each other at 55 miles an hour in an argument over rights to the fast lane, police said yesterday.

The incident occurred Wednesday afternoon when the driver of a pickup truck refused to move to the right after the driver of a black van pulled behind on Rte. 50 and began flashing his headlights and honking his horn, police said.

In the following minutes, the van's driver allegedly fired two shots from a .357 magnum, and the driver of the pickup began firing with a .45-caliber handgun, police said. The shootout ended when the drivers split at a fork in the road.

The van immediately came across a state police radar post on Rte. 301 and told officers what happened. A patrol car in Easton stopped the pickup.

James Fisher, 28, of Stevensville, Md., identified as the van driver, and James Yambor, 37, of Ocean City, Md., identified as the pickup driver, were each charged with assault with intent to murder, assault with intent to maim, a handgun violation and other charges and were held under $10,000 bond. Police said Fisher had been grazed with a bullet in the back of his head.