On a recent Friday, Mr. Bauman, 31, of Bloomfield set up a rudimentary system to test the speed of traffic on Forbes Avenue in front of the Cathedral of Learning. He took his cell phone to the top of the cathedral at 3:15 p.m. and shot 10 minutes of video that he ran through a computer program to determine how fast the vehicles were moving. He found 58 vehicles going faster than 30 mph in a 25 mph zone: 46 between 30 and 35 mph, 10 between 35 and 40 mph and two above 40 mph. “I wasn’t even sure what I would find,” said Mr. Bauman, who has been riding in the corridor for five years as he pursues a graduate degree in bio-engineering.