Naturalistic Observations and Simulation of Communication Between Road Users

Identify what kind of communication we have with other road users (e.g., pedestrians, other vehicles) with cutting-edge technology of computer vision.

The Problem 

Driving automation systems can diminish he normal and predictable communication between drivers and other road users -- such as predictable driver behaviors and person-to-person signals -- as drivers begin to rely more on these systems. This creates a need to design control algorithms and potentially external lighting to be communicate the vehicle’s intent human driver would, such as predictable behaviors between vehicle and pedestrian, merging in traffic, etc.

The Question

How might automated driving systems adequately communicate the vehicle's intents to other road users in the absence of driver engagement and control?

What We Did 

In order to inform the design and development of driving automation control algorithms, we created a simulation using real-world driving data to identify the parameters which are important for driver to other road user communication. These parameters were be adjusted in the simulation to make conclusions about vehicle or pedestrian behaviors that affect the safety and efficiency for future driving automation systems.

The Result: 

Through this research, we discovered the following:

  1. Vehicle trajectories tend to be a strong signal to other road users in how they determine if it is safe to cross the road.
  2. Environmental conditions, such as ambient lighting and stopping distances, make it difficult for pedestrians to reliably make eye contact with drivers -- a key marker in their trust in the oncoming vehicle's behavior -- suggesting that future vehicle to road user communication should go beyond the need for eye contact.
  3. Clarity in stopping and accelerating profiles, which give another road user confidence that a vehicle will stop by a certain point, is important for developing safe and efficient vehicle to road user interactions.