Introduction: According to The Egyptian Central Agency for Public Mobilization and Statistics (CAPMAS), 72% of road traffic accidents occur due to aberrant driving behavior. Substance abuse particularly cannabis is commonly used among Egyptian commercial drivers and seriously affects safe driving. Aim of work: To assess the magnitude of substance abuse among a sample of professional minibus drivers, Zagazig city, Sharqia Governorate, Egypt, to investigate their driving behavior and to determine the predicting factors for the risky driving behavior as a major cause of road accidents. Materials and Methods: A cross sectional study was conducted in Al Ahrar main public station, Zagazig city, Sharqia Governorate, Egypt on a sample of 130 commercial drivers. A structured questionnaire was introduced to all participants and included data on socio occupational status and the driving behavior questionnaire (DBQ) which is composed of 26 items. Substance abuse was screened through rapid assessment urine test. Results: Among the participants, 57.7% tested positive for substance abuse and the most common abused substance was cannabis which represented 80% of the positive participants. The DBQ scores were higher among substance abused drivers with statistical significant difference particularly in most of violations and error items. The predictors for aberrant driving behavior were low income, excessive speeding, previous involvement in road traffic crash and substance abuse. Conclusion: Illicit drugs are commonly used by Egyptian professional drivers and seriously affect safe driving. Driving under the effect of illicit drugs like cannabis, opioid, cocaine, and hallucinogens represents major threat to public safety (Lipari et al., 2016); as it predisposes to health hazards , not only to the driver but also to the passengers and others on the road (Alvarez et al., 2015). Substance use can affect seriously drivers' brain functions essential for safe driving like perception, attention, balance and coordination leading to severe Regular traffic police campaigns for screening of substance abuse among commercial drivers and applying of road safety awareness program can lower the prevalence and burden of road traffic accidents in Egypt.

Introduction: Motorcycles are one of the widely used means of transportation in Egypt nowadays especially three-wheeled motorcycle "Tok-Tok" and there is an increased frequency of crash injuries among motorcycle riders. Aim of work: To assess the risky behaviors and the safety measures in a group of Egyptian motorcycle riders who experienced road traffic accidents, and to study the possible underlying causes of crash accidents. Materials and Methods: A cross-sectional study was conducted on 319 motorcycle riders admitted to Zagazig University Hospitals due to crash accident. A questionnaire was used to gather information about rider's risky behaviors and safety issues along with other socio-demographic data. Results: The study showed that the majority of motorcyclists (87.1 %) don't have a driving license, only (1.9 %) wear helmets and more than half of them (54.5 %) usually use the cell phone while riding and this was noticed more among "Tok-Tok" (3 wheels) riders. About 58.0% of riders don't respect traffic rules as traffic lights or road signs, and the majority ride on highways. Poor riding technique (73.4 %) was the main cause of accidents. Stunting acts were more common among the two wheels riders with riding experience less than 10 years. Conclusion: the results of this study attract the attention to the main causes of crash accidents which relates to human risky behaviour. This raises the need for proper safety education and training of motorcycle riders with traffic law enforcement, especially driving license and safe riding practices which can definitely help in reducing the incidence of road accidents and save human lives.