· Bauer, Karin M., and Douglas W. Harwood. Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways. United States Federal Highway Administration, 2014.
· Marvomatis, Stergios; Psarianos, Basil; Tsekos, Pavlos; Kleioutis, Giorgos; Katsanos, Evaggelos. “Investigation of Vehicle Motion on Sharp Horizontal Curves Combined with Steep Longitudinal Grades”. TRB Annual Meeting 2015. Paper 1578.
· Edara, Praveen, et al. Evaluation of J-Turn Intersection Design Performance in Missouri. Missouri Dept. of Transportation, 2013.
· Gayah, Vikash V., and Eric T. Donnell. Establishing Crash Modification Factors and Their Use. Mid-Atlantic Universities Transportation Center, 2014.
· Hunter, Michael, et al. Reevaluation of Ramp Design Speed Criteria. University of Texas at Austin. Center for Transportation Research, 1999.
· Mehar, Arpan; Chandra, Satish; and Velmurugan, Senathipathi. “Speed and Acceleration Characteristics of Different Types of Vehicles on Multi-Lane Highways” European Transport, Issue 55, ISSN 1825-3997. 2013.
· Maurya, Akhilesh; Bokare, Prashant, “Study of Deceleration Behaviour of Different Vehicle Types” International Journal for Traffic and Transport Engineering. UCD 629.4:531.767. 2012
· Wang, Jun & Dixon, Karen & Li, Hainan & Ogle, Jennifer. (2005). Normal Deceleration Behavior of Passenger Vehicles at Stop Sign-Controlled Intersections Evaluated with In-Vehicle Global Positioning System Data. Transportation Research Record. 1937. 120-127. 10.3141/1937-17.
· Long, Gary. “Acceleration Characteristics of Starting Vehicles” TRB 79th Annual Meeting Paper 00-0980. 2000
· Deligianni, S.P. ... et al, 2017. Analyzing and modelling drivers' deceleration behaviour from normal driving. Transportation Research Record, 2663, pp.134-141.
· Yang, Guangchuan; Wang, Zhongren; Xu, Hao; Tian, Zong. “Feasibility of Using a Constant Acceleration Rate for Freeway Entrance Ramp Acceleration Lane Length Design” Journal of Transportation Engineering, Part A: Systems Volume: 144 Issue Number: 3 Publisher: American Society of Civil Engineers ISSN: 2473-2907
Based on NCHRP 400, “Determination of Stopping Sight Distances”:
· Most modern countries use a perception reaction time of 2 seconds instead of 2.5 seconds. This is closer to the 85th percentile of drivers than the 95th percentile used in the AASHTO policies.
· The deceleration rate of 11.2 ft/s2 is very conservative, and does not represent an emergency stop.
· The object height of 2 ft is very conservative given the current fleet of vehicles with high mounted center taillights and the driver’s inability to recognize the need to stop for a 2’ high object at great distances.
· The 85th percentile driver’s eye height is higher as crossover, trucks, and SUVs represent a larger segment of the vehicle fleet and safety standards have resulted in much taller vehicles.