TY  - JOUR
PY  - 2013//
TI  - Studying the effect of spiral curves and intersection angle, on the accident ratios in two-lane rural highways in Iran
JO  - Promet
A1  - Kamali, Mohammad Hossain Jalal
A1  - Monajjem, Mohammad Saeed
A1  - Ayubirad, Mohammad Sadegh
SP  - 343
EP  - 348
VL  - 25
IS  - 4
N2  - Safety in highways is one of the most important subjects in Transportation Engineering. Increasing rate of vehicles and the needs to design or geometrically modifying the highways, emphasized on the safe-designing of the roadways more than before. Between the constructive components of the highway, horizontal curves due to the more occurrences of accidents are of great importance. The American ministry of highway and transportation introduced the software IHSDM, with variant capabilities, to predict accidents. In this research, five types of curves (simple circle curve and clothoid-circle-clothoid) at different intersection angles were designed, and accident rates based on the standard specifications on each curve was predicted by using the IHSDM, and the results are compared with each other. Finally, by processing the curves of accident rates versus the curves types and intersection angle, and comparing them with each other, the necessity of using spiral curves in the highway design is emphasized.<p /> <p>Language: en</p>
LA  - en
SN  - 0353-5320
UR  - http://dx.doi.org/10.7307/ptt.v25i4.332
ID  - ref1
ER  -