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Erscheinungsjahr: 
2022
Schriftenreihe/Nr.: 
Tinbergen Institute Discussion Paper No. TI 2022-010/VII
Verlag: 
Tinbergen Institute, Amsterdam and Rotterdam
Zusammenfassung: 
Highway construction occurs nowadays mainly through widening of ex- isting roads rather than building new roads. This paper documents that highway widenings considerably reduce congestion in the short run, defined here as 6 years. Using longitudinal microdata from highway detector loops in the Netherlands, we find substantial travel time savings. These savings occur despite strong increases in traffic flow. The welfare benefits in the short run already cover 40% of the widenings' investment costs. Our paper contributes to an explanation why countries invest in roadworks even when the fundamental law of congestion predicts that travel savings disappear in the long run.
Schlagwörter: 
highway widening
congestion
traffic flow
welfare effects
economic activity
JEL: 
R3
R33
R4
R42
H4
Dokumentart: 
Working Paper
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