NBER

Gabriel Kreindler

Department of Economics
Harvard University
1805 Cambridge Street
Cambridge, MA 02138

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NBER Program Affiliations: DEV
NBER Affiliation: Faculty Research Fellow
Institutional Affiliation: Harvard University

NBER Working Papers and Publications

March 2017Citywide Effects of High-Occupancy Vehicle Restrictions: Evidence from the Elimination of ‘3-in-1’ in Jakarta
with Rema Hanna, Benjamin A. Olken: w23295
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 lifting of Jakarta’s HOV policy, we show that after the policy was abandoned delays rose about 39 percent on affected roads during the morning peak—and nearly 69% during the evening peak. Importantly, this was not due to simply a substitution from other roads to the former HOV routes: the lifting of the policy led to worse traffic throughout the city, even on roads that had never been restricted or at times of the day when restrictions had never been in place. The increase in traffic persisted lon...

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