It takes cojones to run on the narrow shoulder of the Schuylkill Expressway.

But that doesn't mean drivers want to see them.

An Emerson, N.J., man surprised motorists along a busy stretch of the Schuylkill in Lower Merion, Montgomery County, about 10:30 a.m. yesterday when he ditched his Toyota Camry in the passing lane, stepped out of the car and stripped nude, state police said.

Darian A. Behrang, 28, then took a jog westbound on the Expressway and made it about a mile before state police responded, they said.

Troopers eventually caught up to Behrang and were forced to engage in a short struggle with the naked man, according to a news release.

Cops wouldn't speculate on what prompted the exhibitionist to jog along the busy roadway, but they did say Behrang was taken to Hahnemann University Hospital for "observation and treatment."

He was charged with disorderly conduct, indecent exposure and resisting arrest. *