If the broken belt drives only the alternator, or all the belts are OK but the light is still on, the car can safely be driven for an hour or more until the battery goes dead. Hopefully, you will be able to find a repair shop in that time. These lights are just to remind the driver to do up the seatbelt or stop for fuel. Amber warning lights are often used to indicate a problem that doesn't immediately affect a person's safety, but that a system has a problem and should be checked as soon as possible. Antilock and Airbag warning lights typically come on for a few seconds after the engine is started, and then go out.
Some vehicles flash the warning lights during startup.
This is normal. If the lights stay on, or come on while driving, the systems may not operate properly and can't protect the passengers. With just the Antilock light on, the driver can drive the vehicle but it should be repaired to ensure the system works properly. The MIL light, sometimes called the engine or check engine light, comes on when a problem in the fuel injection system is detected by the car's computer. If this light comes on while driving, bring the car to a safe stop, turn off the engine, and after a few seconds restart it again.