The emergency number 911 is toll free, including from payphones.Any Emergency • 911
Always keep your antennae out for potential trouble (for further details see Things to Avoid). Park in well-lit areas, and keep doors locked and windows closed while driving. Make sure you know where you’re going, or at least give that impression. Don’t go into uncertain neighborhoods at night.
If you follow the basic precautions, you’re unlikely to be bothered at any time. It is wise to watch out for less aggressive crimes such as pickpocketing, so keep valuables tucked away.