Any motorist regularly navigating Bell Road knows those times of day when it will bog down and back up. [...] although some of the half-dozen Valley jurisdictions in its path are seeking solutions through new traffic-control measures and expansion of nearby streets, Ron Amaya, Peoria's assistant city engineer, warned that a certain amount of bumper-to-bumper traffic comes with the urbanization of what were once suburbs. According to Book, major Valley arterial streets should be able to accommodate up to 40,000 vehicles a day.