TY - JOUR
T1 - Traffic Flow Impacts of Converting an HOV Lane Into a Dedicated CACC Lane on a Freeway Corridor
AU - Xiao, Lin
AU - Wang, Meng
AU - van Arem, Bart
N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2020
Y1 - 2020
N2 - Cooperative Adaptive Cruise Control (CACC) systems can increase roadway capacity, but the benefits are marginal at low market penetration rates (MPRs). Thus, a CACC dedicated lane is considered to group CACC vehicles for efficient traffic stream. Concepts of converting existing High Occupancy Vehicle (HOV) lanes into CACC lanes emerge, which leverages the infrastructural facilities and experience with HOV lanes. However, it is unclear to which extent changing HOV lanes to CACC lanes can influence freeway operations. This study examines the traffic flow impacts of converting HOV lanes into CACC lanes regarding CACC MPRs on a complex freeway corridor with multiple interacting bottlenecks in California. A simulation model capable of reproducing flow characteristics with HOV lane and CACC systems is employed for the assessment. Special attention is paid to macroscopic congestion patterns, CACC lane utilization, travel time reliability and CACC operation characteristics. The results show that converting to CACC lanes at low MPRs ( % 1 )30 can exacerbate congestion in general purpose lanes, whereas at mediate CACC MPRs (40%–50%) the congestion is drastically alleviated due to a large share of traffic carried by CACC lanes.
AB - Cooperative Adaptive Cruise Control (CACC) systems can increase roadway capacity, but the benefits are marginal at low market penetration rates (MPRs). Thus, a CACC dedicated lane is considered to group CACC vehicles for efficient traffic stream. Concepts of converting existing High Occupancy Vehicle (HOV) lanes into CACC lanes emerge, which leverages the infrastructural facilities and experience with HOV lanes. However, it is unclear to which extent changing HOV lanes to CACC lanes can influence freeway operations. This study examines the traffic flow impacts of converting HOV lanes into CACC lanes regarding CACC MPRs on a complex freeway corridor with multiple interacting bottlenecks in California. A simulation model capable of reproducing flow characteristics with HOV lane and CACC systems is employed for the assessment. Special attention is paid to macroscopic congestion patterns, CACC lane utilization, travel time reliability and CACC operation characteristics. The results show that converting to CACC lanes at low MPRs ( % 1 )30 can exacerbate congestion in general purpose lanes, whereas at mediate CACC MPRs (40%–50%) the congestion is drastically alleviated due to a large share of traffic carried by CACC lanes.
UR - http://www.scopus.com/inward/record.url?scp=85076833294&partnerID=8YFLogxK
U2 - 10.1109/MITS.2019.2953477
DO - 10.1109/MITS.2019.2953477
M3 - Article
AN - SCOPUS:85076833294
SN - 1939-1390
VL - 12
SP - 60
EP - 73
JO - IEEE Intelligent Transportation Systems Magazine
JF - IEEE Intelligent Transportation Systems Magazine
IS - 1
M1 - 8935242
ER -