In cities worldwide, the widespread use of single occupancy cars often leads to traffic congestion and its associated ill effects. Using high frequency data from Google Maps, we test whether high-occupancy vehicle (HOV) policies can be an effective tool to combat congestion. Using the unexpected...

We use high frequency data on traffic congestion from Google Maps to measure the impact of Jakarta's main traffic congestion reduction policy, a high-occupancy vehicle restriction policy. We find that the unexpected lifting of the policy led to a large, sudden and persistent increase in travel...