This happened to me on a road trip. A traffic jam on a highway caused a large amount of cars to be re-routed onto a route made up of local roads. Unfortunately,

This happened to me on a road trip. A traffic jam on a highway caused a large amount of cars to be re-routed onto a route made up of local roads. Unfortunately, a small bridge along that local route was closed for construction, so all of the re-routed cars were being funnelled into a narrow dead-end. It was difficult for cars to turn around because the long line of cars couldn't effectively reverse to make space. It was a long time before I made it back to the highway and was able to re-enter the original traffic jam I was avoiding.