"prevent accidents" is correct and usable in written English.
You could use it in a sentence about safety precautions, for example: "It is important to take safety precautions to prevent accidents."
They insisted the rules were tough enough to prevent accidents.
Amundsen would appreciate the message: prevent accidents, plan ahead.
"GMT was not set to save electricity or prevent accidents.
It said new procedures were needed to prevent accidents.
The repairs are necessary to prevent accidents, said Matt Allen, a spokesman for Mayor Kwame Kilpatrick.
It could be that drinking in such moderation might prevent accidents.
"We are taking all sorts of measures to prevent accidents," a Tepco spokeswoman said.
The objective was to reduce noise more than to prevent accidents.
All commercial drivers, for example, work restricted hours to prevent accidents.
There are drops to ancestors, and to the road gods who can prevent accidents.
Cameras do help prevent accidents (pdf) but these fines aren't ring-fenced for safety measures.
