Abstrakti
Restricting left turns throughout a network improves overall flow capacity by eliminating conflicts between leftturning and throughmoving vehicles. However, doing so requires vehicles to travel longer distances. Implementing leftturn restrictions at only a subset of locations can help balance this tradeoff between increased capacity and longer trips. Unfortunately, identifying exactly where these restrictions should be implemented is a complex problem because of the many configurations that must be considered and interdependencies between leftturn restriction decisions at adjacent intersections. This paper compares three heuristic solution algorithms to identify optimal location of leftturn restrictions at individual intersections in perfect and imperfect grid networks. Scenarios are tested in which restriction decisions are the same for all intersection approaches and only the same for approaches in the same direction. The latter case is particularly complex as it increases the number of potential configurations exponentially. The results suggest all methods tested can be effectively used to solve this problem, although the hybrid method proposed in this paper appears to perform the best under scenarios with larger solution spaces. The proposed framework and procedures can be applied to realistic city networks to identify where leftturn restrictions should be implemented to improve overall network operations. Application of these methods to square grid networks under uniform demand patterns reveal a general pattern in which left turns should be restricted at central intersections that carry larger vehicle flows but allowed otherwise. Such findings can be used as a starting point for where to restrict left turns in more realistic networks.
Alkuperäiskieli  Englanti 

Artikkeli  03611981211011647 
Sivut  452467 
Sivumäärä  16 
Julkaisu  Transportation Research Record 
Vuosikerta  2675 
Numero  10 
Varhainen verkossa julkaisun päivämäärä  13 toukok. 2021 
DOI  pysyväislinkit  
Tila  Julkaistu  lokak. 2021 
OKMjulkaisutyyppi  A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä 
Sormenjälki
Sukella tutkimusaiheisiin 'Identification of Optimal LeftTurn Restriction Locations using Heuristic Methods'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Lehtileikkeet

Still waiting at an intersection? Banning certain left turns helps traffic flow
06/07/2021 → 07/07/2021
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