HB478 Summary

• Amends Alabama's driving under the influence (DUI) statute to consolidate and clarify definitions of prohibited driving conduct involving alcohol, controlled substances, and impairing substances.

• Defines "under the influence" as not having normal use of mental or physical faculties due to introduction of alcohol, controlled substances, drugs, or any combination thereof into the body.

• Maintains existing blood alcohol concentration limits: 0.08% for drivers 21+, 0.02% for drivers under 21, and 0.04% for commercial motor vehicle operators.

• Establishes graduated penalties ranging from 90-day license suspension and $600-$2,100 fines for first offense to Class C felony charges (1-10 years imprisonment and $4,100-$10,100 fines) for fourth or subsequent convictions within five years.

• Requires mandatory ignition interlock device installation for most DUI convictions, with duration based on offense severity and blood alcohol concentration levels, along with court-ordered DUI/substance abuse program completion.