Charles C. Word, 31, of Newark, is accused of an incident on May 1st at North Harmony Road and Ogletown Stanton Road.
According to police the female victim was in her car, stopped at a red light with the windows open.
Then, police say, the woman heard a man in another vehicle say "how do you like it?"
Then, investigators say, the woman looked over to see Word masturbating while looking at pornography on a laptop computer.
After learning that Word had been charged for a similar incident in late May, police obtained a warrant for Word's arrest.
He was charged on Friday and released on $500 unsecured bail.
Word, who was also a baseball coach at Appoquinimink, was placed on administrative leave after his first arrest.
There was no immediate update available on his current employment status with the school district.