Signal-Vehicle Coordination Control Modeling and Roadside Unit Deployment Evaluation under V2I Communication Environment

Table 1

Relative indicators for impact analysis of RSU deployment on control performance.

Indicators	Types	Definitions
Reduction in vehicle delays	Evaluation index of control performance	The difference between the total delays with and without the signal-vehicle coordinated control under CV-RSU communication
The number of vehicles in the RSU communication domain	Observation index of CV-RSU communication	The average number of vehicles in the RSU communication domain per second
Connectivity probability between CV and RSU	Observation index of CV-RSU communication	The average connectivity probability between CV and RSU
The number of vehicles whose speeds are successfully optimized	Observation index of signal-vehicle coordinated control	The number of CVs whose speeds are successfully optimized and pass through the intersection without stopping during the signal cycle (including the green extension time)
The number of speed adjustments	Observation index of signal-vehicle coordinated control	The number that CVs adjust their speed toward the suggested speed received from RSU
Green extension time	Observation index of signal-vehicle coordinated control	The total green extension time that the signal controller executes
Overlap rate of the communication domains of multiple RSUs	Observation index of CV-RSU communication	The ratio of the overlapping communication area of multiple RSUs to their total communication area