The Department of Transportation requires employers to test drivers for drugs — for good reason. There are highly specific guidelines for employers to follow. Whether you’re a DOT candidate or not, these are perhaps the best guidelines you can find and should help you think through your commitment to a drug-free workplace. Note that the laws surrounding DOT testing may not be permissible in all environments. For example, most states now prohibit random drug testing.
Click here to see the guidelines. You can find excellent help on creating a drug free workplace here.