Driving behavior in a real and a simulated road tunnel--a validation study

Area of Science:

• Human-computer interaction
• Transportation engineering
• Psychology

Background:

• Driving simulators are increasingly used to study driver behavior.
• Validating simulator fidelity against real-world driving is crucial for reliable research.
• Road tunnels present unique driving challenges due to limited visibility and confined space.

Purpose of the Study:

• To validate driving behavior in a simulated road tunnel environment.
• To compare speed and lateral position in a real tunnel versus a driving simulator.
• To assess the behavioral validity of driving simulators for tunnel scenarios.

Main Methods:

• Twenty subjects drove a passenger car in a real tunnel and a VTI driving simulator replica.
• Speed and lateral position data were collected in both environments.
• Driving conditions included a left-hand steered, manually geared car.

Main Results:

• Driving speed was higher in the simulated tunnel than the real tunnel.
• Eliminating speedometer feedback increased speed similarly in both settings.
• Lateral positioning showed subjects stayed further from walls in the real tunnel; deviation increased in curves in the simulator.

Conclusions:

• Absolute behavioral validity was not fully satisfactory, especially concerning speed choice.
• Relative validity for both speed and lateral position was deemed good.
• Driving simulators offer valuable insights but require careful consideration of specific behavioral metrics.