Those who choose it however, run a risk of injury. For some runners, there are streets that beckon to have miles logged in on them, no matter that dangers. If you do choose to train with traffic, you'll want to make sure you are doing so in the safest way possible.
Run against traffic. While bikes are required to follow traffic laws, runners, or simply fast-moving pedestrians, are not. Moving in the opposite direction of traffic allows you to always be prepared to act if a vehicle is nearing. However, you should mind most other traffic laws for your safety and the safety of the surrounding traffic. For example, stop at stop signs, never jay run, and it never hurts to use hand signals as you may have seen cyclists use.