Survey: What blocks your bus’

University of Washington researchers are inviting the public to share instances where vehicles block buses in Seattle and Bellevue in a survey. University of Washington - It's something every bus rider fears: Their bus is running late. Under typical conditions, Seattle has some of the most congested traffic in the nation. To prepare for when things return to normal, University of Washington researchers are carrying out a research project to investigate reasons for these delays. While a bus could be late for many reasons, one holdup is that it has to compete with other vehicles - personal vehicles, ride-hailing cars, delivery trucks, etc. that might be parked at the bus stop or double-parked in a travel lane. People riding the bus have the prime seat to witness potential events like this.