Drug tests can be requested for any number of reasons. A workplace may request a drug test as part of the pre-employment screening process, or they may perform random drug testing throughout the company to test for drug use happening on the job. Drug testing is also common in high level athletics including college level and professional sports. In this case, testing is typically done to check for the presence of performance enhancing drugs that could give athletes an unfair advantage. A drug test may be requested following a vehicular accident or an accident that happened on the job, particularly if the accident was caused by human error and resulted in property damage or serious injury, or death, to another person. Many workplaces will also request drug tests for safety reasons when an employee’s job tasks could lead to safety issues if the employee were to perform them under the influence of drugs and have their ability or judgement impaired. Drug testing is common in several industries as it relates to the ability of individuals to perform their job without putting the safety of themselves or others at risk. Industries such as federal transportation, the airline industry, bus drivers, truck drivers, hospitals and railways are some examples where drug testing is common due to the nature of the job responsibilities and their interaction with the general public.