Idaho's DUI limits depend on your age and what you're driving, and penalties climb steeply with each conviction. Knowing how to handle a traffic stop keeps it safe for everyone.
You are driving under the influence at a BAC of
| Driver | BAC |
|---|---|
| Under 21 | .02 or more |
| Operating a commercial vehicle | .04 or more |
| 21 or older | .08 or more |
Know the rule
A BAC of .20 or more carries even stiffer penalties. Even under .08, you may be convicted of driving under the influence of other intoxicating substances.
Handbook p. 131 ↗Criminal DUI penalties
| Conviction | Jail / fine | License suspension |
|---|---|---|
| First | Up to 6 months; up to $1,000 | 90-180 days (1 yr under 21); 30 days absolute |
| Second in 10 yrs | 10 days-1 yr (30 days under 21); up to $2,000 | One year (two years under 21) |
| Third+ in 10 yrs | 30 days-10 yrs; up to $5,000 | One to five years |
Know the rule
For a third or subsequent DUI within 10 years, drivers under 21 face 10 days to six months in jail, up to $2,000, and a 1-year suspension or until age 21, whichever is greater.
Handbook p. 132 ↗Know the rule
A third or subsequent DUI conviction within 10 years is a felony. After any DUI suspension, an ignition interlock restriction will likely be required.
Handbook p. 132 ↗Know the rule
CDL drivers face enhanced DUI penalties, up to lifetime loss of CDL privileges.
Handbook p. 132 ↗When law enforcement stops you:
- Stay calm, signal, and pull off the road as soon as it's safe
- Turn off the ignition and radio; stay inside unless told to exit
- Keep your hands on the steering wheel where they're visible
- You and passengers shouldn't use phones or mobile devices
- Don't make sudden moves or search for documents; wait for instructions
- If there's a weapon in the vehicle, tell the officer at first contact
Know the rule
If your license, insurance, or registration is out of reach, tell the officer where it is before reaching. If asked to step out, stay away from traffic with hands in plain view.
Handbook p. 133 ↗Know the rule
Signing a ticket is not an admission of guilt, but refusing to sign may get you arrested. Contest it in court; report inappropriate officer conduct to the agency named on the ticket.
Handbook p. 133 ↗Put it into practice
A 19-year-old has one beer and is stopped with a BAC of .03. That's under the .08 adult limit but over the .02 limit for drivers under 21, so it counts as driving under the influence.