Applying Bundled Speed-Harmonization, Cooperative Adaptive Cruise Control, and Cooperative-Merge Applications to Managed-Lane Facilities

Federal Highway Administration2021PDFTech ReportMa, JiaqiLeslie, EdGhiasi, AmirGuo, YiSethi, SonikaHale, DavidShladover, SteveLu, Xiao-YunHuang, ZhitongLeidos, Inc.United States. Federal Highway AdministrationFerlis, RALochrane, TaylorUnited States. Federal Highway AdministrationUnited StatesStandardizationSpeed controlConnected vehiclesAutomated vehicle controlManaged lanesTraffic platooningFHWA-HRT-21-008DTFH61-12-D-00020Task Order 26Ferlis, RobertThe purpose of this document is to describe the research, including simulations and a field experiment, involving the operation of connected and automated vehicles (CAVs) on managed lanes. The scenarios associated with this concept were chosen and designed to facilitate rapid and successful deployment of a solution that is not yet in use. The proposed operation involves deploying platoons of CAV-equipped vehicles that are governed by an integrated set of speed-harmonization, cooperative-merge, and cooperative-adaptive-cruise-control (CACC) applications. The concept accounts for CACC-vehicle behaviors in the vicinity (both upstream and downstream) of managed-lane entry ramps. The concept further addresses platooning and cooperative merging on the managed lane. The concept was simulated, and potential improvements were quantified. The results were then implemented in a small number of real vehicles and tested on a real roadway under controlled conditions and in mixed traffic.121