Seyyedeh Mahta Mortazavian Farsani - Department of Industrial and Systems Engineering Sharif University of Technology Tehran, Iran
Motahareh Tavakoli - Department of Industrial and Systems Engineering Sharif University of Technology Tehran, Iran
Hamed Shahsavani - Department of Industrial and Systems Engineering Sharif University of Technology Tehran, Iran
AmirKhosro Bahadori - Department of Industrial and Systems Engineering Sharif University of Technology Tehran, Iran

Purpose: To evaluate the prevalence of the Musculoskeletal Disorders (MSDs) amongst urban Ordinarybus and BRT-bus drivers (O-BDs and B-BDs respectively).Method: 314 urban O-BDs and B-BDs in Tehran citywere asked through Standard Nordic Questionnaire added by some general questions required for the research. It was then analyzed via SPSS 18 (PASW) software.Results: All disorders except for the one at Left-wrist region showed no significant differences between O-BDs andB-BDs. Parameters age, bus model, years of professional bus driving, working days per month, working minutes per day,time taken in each half-way with and without traffic jams,sporting and smoking have yielded significant outcomes across these two groups of bus drivers. Besides, B-BDs have shown their mean to be greater than O-BDs with the aspect of working days per month, and time taken in each half-waywith and without traffic, and O-BDs have shown to be greater than B-BDs in mean with respect to working minutes per day.Conclusions: Although B-BDs, on average, work fewer hours per month, and their typical more up-to-dated bus systems provide them with better working conditions, and also their driving mostly in dedicated lanes keeps them more distant from common street traffic jams, they have shown no significant differences with O-BDs in almost all of the disorders, due to prolonged and non-interrupted half-ways besides significantly less resting times at terminals.

Musculoskeletal Disorders (MSDs); BRT-Bus Driver (B-BD); Ordinary-Bus Driver (O-BD)