They help greatly. If laser is used on any vehicle in front of you, you will get a signal alerting you to slow down. Now if you are the only vehicle on the road, best bet is to keep your eyes open.

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An unwavering defender of those I see worth protecting.

"promote the general welfare, not provide the general welfare"

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.