Three separate trespass actions were instituted, all of them arising out of a right angle collision between the automobile of P, and a police car of D. Ps were proceeding south on Sixth Street at about 25 mph and, as they approached the intersection of that street with Girard Avenue, William A. Sims, a member of the city police force, was operating a police car and was proceeding west on Girard Avenue towards its intersection with Sixth Street. In the police car were Rocco LaMarra, another policeman, a doctor, and a father with his prematurely born child. The streets were dry, and visibility was good. P reached the intersection and observed only one car approaching from his left 'some distance away.' It was a red police car. No horn, whistle, or other signal was sounded or given by the operator of the police car. The signal traffic light controlling the traffic was, and remained, green in favor of P and was red for Girard Avenue traffic. P continued into the intersection. P again observed the police car, which was then about fifteen feet away, and was proceeding directly toward his car at a very fast rate of speed. He attempted to avoid a collision by accelerating the speed of his car. The police car crashed into the left side of his car immediately in front of the door. P's car crashed into an iron telegraph pole. Ps sued the police officers and D. The court ruled in favor of Ps. D appealed.

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