Abstract
In this paper, we examine the network-wide impacts of speed limits on network uncertainty. A multi-dimensional modeling approach is proposed to investigate the impacts of speed limits on link travel time uncertainty profile, travelers' risk-averse route choice decisions, and network flow reallocation under uncertainty. Methodologically, a truncated travel time probability distribution is proposed and its moments are derived to characterize the impact of speed limit on link travel time uncertainty profile. The mean-excess travel time is then adopted as a risk measure to account for travelers' risk-averse route choice adjustment and network flow reallocation induced by speed limits. We find that a speed limit scheme has different impacts on various dimensions of travel time uncertainty. The shift in travel time uncertainty profile of the directly affected links adjusts the traveler's risk-averse route choice decisions, the travel time uncertainty profile of the indirectly affected links, and consequently the network flow reallocation.
Original language | English |
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Pages (from-to) | 66-88 |
Number of pages | 23 |
Journal | Transportmetrica A: Transport Science |
Volume | 14 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2 Jan 2018 |
Keywords
- mean-excess travel time
- network uncertainty
- route choice
- Speed limit
ASJC Scopus subject areas
- Transportation
- Engineering(all)