If I'm stopped for driving under the influence, can a police officer ask me questions without reading me my rights?

Sometimes. The answer depends on whether or not you are in police custody -- that is, whether you are subject to the restraints common to a formal arrest. For example, the U.S. Supreme Court has ruled that the police do not have to provide Miranda warnings during roadside questioning of a motorist detained pursuant to a traffic stop. Thus, roadside questioning about your drinking, drug-taking, or performance on field sobriety tests does not constitute "custodial interrogation." However, once you are arrested -- or restrained by the police in a manner consistent with arrest -- you must be read your Miranda rights.

I've been charged with drunk driving. Should I get a lawyer?

Defending against a charge of drunk driving is a tricky business. Defenders need to understand scientific and medical concepts, and must be able to question tough witnesses, including scientists and police officers. If you want to fight your drunk driving charge, you're well advised to hire an attorney who specializes in these types of cases.

On the other hand, these days it's hard to "win" a drunk driving case, assuming the police gathered some physical evidence against you (results of a breathalyzer, blood test, or urine test). And the punishments for DUI are pretty standard. If you were truly guilty, it's unlikely that a lawyer could get you any better of a deal or plea bargain than you can get for yourself.

I was pulled over at a roadblock and asked to wait and answer a police officer's questions. Is this legal?

Yes, as long as the police use a neutral policy when stopping cars (such as stopping all cars or stopping every third car) and they minimize any inconvenience to you and the other drivers. The police can't single out your car at a roadblock unless they have good reason to believe that you've broken the law.