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Abstract
This research empirically examines the affect of street funding on journey time and its variability in an area Japanese metropolis, the place a brand new bypass was launched parallel to an current nationwide freeway. The common therapy results of the bypass had been estimated utilizing propensity rating matching. Travel time was outlined because the every day common route-level journey time between origin and vacation spot zones, derived from international positioning system (GPS)–primarily based journey information. Travel time variability was measured utilizing the day-to-day commonplace deviation, planning time, and buffer time of route-level journey occasions. The dataset consists of 144 million journeys noticed earlier than the bypass opening and 167 million after. To assess robustness, the consequences had been estimated throughout 18 circumstances with totally different data-screening methods. Results constantly present statistically vital reductions in journey time and planning time. On common, journey occasions for the therapy group had been 1.02–2.75 min decrease than these of the management group, whereas planning time decreased by 0.55–3.21 min. Effects on journey time variability measured by commonplace deviation and buffer time had been much less sturdy. The findings spotlight clear journey time financial savings from the bypass and the significance of accounting for temporal knowledge protection when measuring journey time variability.
Suggested Citation
“Does road investment reduce average travel time and travel time variability?: Empirical evidence from Japan,”
Research in Transportation Economics, Elsevier, vol. 118(C).
Handle: RePEc:eee:retrec:v:118:y:2026:i:c:s0739885926001034
DOI: 10.1016/j.retrec.2026.101806
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Keywords
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JEL classification:
- R41 – Urban, Rural, Regional, Real Estate, and Transportation Economics – – Transportation Economics – – – Transportation: Demand, Supply, and Congestion; Travel Time; Safety and Accidents; Transportation Noise
- R42 – Urban, Rural, Regional, Real Estate, and Transportation Economics – – Transportation Economics – – – Government and Private Investment Analysis; Road Maintenance; Transportation Planning
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