In 1990, the U.S. Supreme Court considered the constitutionality of sobriety checkpoints. The court upheld the use of this law enforcement tool but urged police to provide the public with prior notice of upcoming checkpoints, in order to not only render such checkpoints less intrusive, but also to increase the deterrent effect of checkpoints. Since that time, many services have sprung up offering to pass on this information to the public in a more convenient form, such as text messaging. Receiving text message alerts regarding upcoming checkpoints is as simple as signing up for one of these services.
Determine whether your state, city or other municipality has a free messaging service available. Some states, such as South Dakota, have free messaging programs available from the Department of Public Safety or similar agency.
Shop around if there is no free service available in your area. There are a wide variety of services available on the market, with varying prices and features.
Sign up. You will need to provide your basic personal information and your cell phone number.
Pay the service fee if there is no free service available in your area. Some services offer a free trial period. After that trial period, however, you will need to pay the company's annual, semiannual or monthly service fee. Different services accept different payment methods, including credit cards and PayPal.