Revision of Calculation of Stopping Sight Distance

Jianchuan Cheng, Hao Yuan, Guifang Shi, Xiaoming Huang


Stopping Sight Distance (SSD) is a critical parameter for roadway geometric design and safety evaluation. It experienced several revisions in AASHTO Green Books (A Policy on Geometric Design of Highways and Streets) since 1940. This paper firstly lists the revision history of SSD model in the last 70 years in the USA as example, and then points out that the more critical conditions for vehicles driving at curves with superelevation should be used for SSD calculation. Based on that, this paper conducts a revised SSD calculation model which is universal and more reasonable for SSD calculation. Finally, a case study was completed to show the difference between the existing and the revised calculations of SSD. The revised SSD model suggested basically increasing longer SSDs as speed varies from 30 km/h to 110 km/h, and a little decline at speed 120 km/h.


stopping sight distance (SSD); roadway geometric design; curve; highway alignment; driving speed; highway safety

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Arndt, O. K.; Cox, R. L.; Lennie, S.; Whitehead, M. 2010. Provision of Sight Distance around Concrete Barriers and Structures on Freeways and Interchanges, in Proc. of the 4th International Symposium on Highway Geometric Design. 2–5 June, 2010, Valencia, Spain.

Bogdevičius, M.; Vladimirov, O. 2006. Efficiency of a Braking Process Evaluating the Roughness of Road Surface, Transport 21(1): 3–7.

Discetti, P. 2010. Experimental Analysis on Hairpin Curves, Baltic Journal of Road and Bridge Engineering 5(3): 148–155. doi:10.3846/bjrbe.2010.21

Durth, W.; Bernhard, M. 2000. Revised Design Parameters for Stopping Sight Distance, in Proc. of the 2nd International Symposium on Highway Geometric Design. June 14–17, 2000, Mainz, Germany.

Easa, S. M. 2009. Improved Sight Distance Model for Sag Vertical Curves with Overpasses, Transportation Research Record 2120: 28–36. doi:10.3141/2120-04

Fambro, D. B.; Fitzpatrick, K.; Koppa, R. J. 1997. Determination of Stopping Sight Distances. NCHRP Report 400. National Research Council, Washington DC. 134 p.

Greibe, P. 2008. Determination of Braking Distance and Driver Behaviour Based on Braking Trials, in Proc. of the 87th Transportation Research Board Annual Meeting. January 13–17, 2008, Washington D.C.

Hall, J. W.; Turner, D. S. 1988. Stopping Sight Distance: Can We See Where We Now Stand?, Transportation Research Record 1208: 4–13

Harwood, D. W.; Fambro, D. B.; Fishburn, B.; Joubert, H.; Lamm, R.; Psarianos, B. 1995. International Sight Distance Design Practices, in Proc. of the 1st International Symposium on Highway Geometric Design. August 30 – September 1, 1995, Boston, Massachusetts, United States.

Johansson, G.; Rumar, K. 1971. Drivers’ Brake Reaction Time, Human Factors 13(1): 23–27

Mavromatis, S.; Psarianos, B.; Kasapi, E. 2005. Computational Determination of Passenger Cars’ Braking Distances Equipped with Anti-Block Brake Systems, in Proc. of the 3rd International Symposium on Highway Geometric Design. June 29 – July 1, 2005, Chicago, Illinois, United States.

Nehate, G.; Rys, M. 2006. 3D Calculation of Stopping-Sight Distance from GPS Data, Journal of Transportation Engineering 132(9): 691–698. doi:10.1061/(ASCE)0733-947X(2006)132:9(691)

Normann, O. K. 1953. Braking Distances of Vehicles from High Speeds, Highway Research Board Proceedings 32: 421–436.

Olson, P. L.; Cleveland, D. E.; Fancher, P. S.; Kostyniuk, L. P.; Schneider, L. W. 1984. Parameters Affecting Stopping Sight Distance. NCHRP Report 270, Transportation Research Board. Washington, DC. 442 p.

Prosser, W. A. 2005. Country Report-United States: Development of Geometric Design Standards, in Proc. of the 3rd International Symposium on Highway Geometric Design. June 29–July 1, 2005, Chicago, Illinois, United States.

Sarhan, M.; Hassan, Y. 2009. Reliability-Based Methodology to Calculate Lateral Clearance on Three-Dimensional Alignment, in Proc. of the 88th Transportation Research Board Annual Meeting. January 11–15, 2009, Washington DC, USA.

Shi, G.; Yuan, H.; Cheng, J. 2010. Calculation of Speed Limit on Foggy Days, Journal of Southwest Jiaotong University 45(1): 136–140. doi:10.3969/j.issn.0258-2724.2010.01.023

Yuan, H.; Shi, G.; Huang, X.; Cheng, J. 2009. Braking Model of Stopping Sight Distance, Journal of Southeast University (Natural Science Edition) 39(4): 859–862. doi:10.3969/j.issn.1001-0505.2009.04.041

DOI: 10.3846/bjrbe.2011.13


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