The small town of Bow Mar, Colorado (population ~950), located between Denver and Littleton, recently voted to construct an entrance gate to stop cut-through traffic from surrounding areas who use local streets as shortcuts.

The town's population is about 950, but a traffic study found that about 1,200 vehicles travel through the community every day.

Denver and Littleton leaders opposed the idea. Both cities asked Bow Mar to pause the proposal and work with them on a different solution. They argued that "Bow Mar undoubtedly expects its residents to have reasonable access to Denver and Littleton roads and rights-of-way. Denver and Littleton expect the same in turn."

Denver City Councilman Kevin Flynn warned that installing a gate could prompt Denver to consider a similar measure on the city's side of the road, effectively blocking Bow Mar's access to its own gate.

https://www.cbsnews.com/colorado/news/bow-mar-colorado-approves-entrance-gate-traffic-dispute-denver-littleton

https://www.cbsnews.com/colorado/news/car-colorado-lake-renews-debate-proposed-traffic-gate-bow-mar