Surrogate Measures of Safety/Minimal Road User Interaction Simulation

Master's thesis by Utilisateur:LionelNebotJanvier.

Objectives

General objective: to generate simple road user trajectories from theoretical or empirical headway distributions and compute distributions of surrogate measures of safety (SMoS) like time to collision and post-encroachment time.

Specific objectives:

• to study the impacts on TTC and PET distributions of
  • parameters of the scene and "instrumentation": the size of the area of interest, analog to the camera field of view)
  • road characteristics: type of traffic control devices, in particular traffic lights compared to yield signs (minor/major road)
  • traffic characteristics: volume, headway distributions, etc.

Case studies: pedestrian crossing, intersection of vehicles with traffic lights, stop signs or yield (roundabout?)

Methodology

• Collect and characterize road user headway distributions
• Develop the model of the scene and road users, and the tools to save/load them: how many parameters, extensible model?
• Generate trajectories and compute SMoS

Choices

• Use of curvilinear coordinate system: interactions can occur within each link (rear end) and only at nodes for road users from different streams
• If movement at constant speed, there is a need to include perception-reaction time for the road user without priority to react (is there?)

To be decided:

• road user volume (instead of centroid/circle representation)
• minimal graphical representation

Resources

• General resources Surrogate_Measures_of_Safety#Resources