Developing "Street Smarts"

The greater degree of independence in living or employment an adult with autism enjoys, the more he or she may be traveling within the community or for work to places beyond the local area. Whether walking, biking, driving, or using public transportation, travel can take one through unsafe or unfamiliar settings and unwittingly expose a person to some form of risk or even street crime.
What are some of the common sense, preventive steps an adult with autism should take or needs to learn to minimize those types of risks?
Some suggest that minimizing risk is predicated on one’s ability to “blend in” so to speak. Dressing appropriately for the area, not carrying large amounts of cash, and avoiding lingering in one place for too long are some pieces of advice. Is there anything else one should do when traveling to an unfamiliar destination?