1. AASHTO (1994). A Policy on Geometric Design of Highway and Streets (Metric Units Edition). American Association of State Highway and Transportation Officials, Washington DC.
2. AASHTO (2001). A Policy on Geometric Design for Streets and Highways. American Association of State Highway and Transportation Officials, Washington DC.
3. Cardiac Measures of Driver Workload during Simulated Driving with and without Visual Occlusion