1. Colgate, M.G., Tanner, J.C., 1967. Accidents at rural three-way junctions. Road Research Laboratory, Ministry of Transport, RRL Report LR 87.
2. Driver behaviour and accident records at unsignalized urban intersections;Polus;Accident Analysis and Prevention,1985
3. The safety implications of some control changes at urban intersections;Frith;Accident Analysis and Prevention,1986
4. Intersection control by stop and give way signs- The conclusions of Polus;Frith;Accident Analysis and Prevention,1987
5. Agent, K.R., 1987. Traffic control and accidents at rural high speed intersections. Kentucky Transportation Cabinet. Report No. UKTRP-87-6.