[Sandy]

You are confusing the term "reckless" with "erratic."

I wasn't confusing them; I was equating them. But you're right, erratic is a better word. Re-read my comments and substitute erratic for reckless.

[P-Marlowe]

It is not necessarily against the law to drive erratically. It is against the law to drive recklessly. If you are driving erratically, the police would have a reasonable suspicion that you were driving recklessly. Erratic driving gives the police reasonable cause to pull you over. But in 99% of all fatal accidents involving drunk drivers nobody saw the erratic driving of the drunk until it was too late.

The important thing is to get these drunks off the road, and the BAC test is a good objective determiner of how many drinks a driver had before he climbed behind the wheel. It is also a good objective determiner for whether or not the driver was merely driving erratically or whether he was driving recklessly.