Drivers in Champaign-Urbana might notice something unusual this Saturday: more than 100 University of Illinois students stationed on street corners throughout the city, counting cars and recording their movement on smart phones. The students will be helping transportation researchers in the Department of Civil and Environmental Engineering and the Coordinated Science Laboratory test an innovative new system that monitors traffic congestion and can provide valuable, real-time information to police, emergency personnel and the public with the goal of helping traffic flow more smoothly during major events.