Every state uses some form of Graduated Driver Licensing (GDL) to phase teens into full driving privileges. Here is how it works and what parents need to track.
The 3 GDL stages
Almost every state follows the same 3-stage structure, just with different age thresholds:
- Learner's permit — supervised driving only. Can't drive alone.
- Provisional / intermediate license — drive alone, with restrictions on hours and passengers.
- Full unrestricted license — adult-equivalent driving privileges.
Stage 1: Learner's permit
- Eligibility age: 14-16 depending on state. Some states (NJ, MA) require 16; Iowa allows 14.
- Permit-holding minimum: 6-12 months before you can apply for the next stage.
- Supervised driving log: 30-50 hours required (often including 10 hours at night). Parents must sign off.
- Restrictions:
- Always supervised by a licensed adult (typically 21+, sometimes 25+).
- No phone use whatsoever — even hands-free is prohibited in most states.
- Zero blood alcohol limit (vs 0.08% for adults).
Stage 2: Provisional / intermediate license
After holding a permit for the required period and reaching the right age:
- Eligibility age: 16-17 typical. Some states have 18.
- Restrictions vary by state but usually include:
- Night driving curfew — no driving 11 PM to 5 AM (or similar window) without a parent.
- Passenger limit — only 1 non-family passenger under 21 for first 6-12 months.
- Cell phone ban — extends from permit phase.
- Seatbelt for all passengers — mandatory.
Stage 3: Full unrestricted license
- Eligibility: Usually 17-18, after 12+ months in the provisional stage with a clean record.
- No restrictions beyond regular adult driver license rules.
- Some states require an additional in-person renewal visit at this transition.
How parents should structure supervised hours
The 30-50 supervised hours required by your state should cover varied conditions:
- Daylight, dry roads — start here. Empty parking lots first, then quiet residential streets.
- Night — most states require 10 hours specifically at night. Practice on familiar roads first.
- Rain / wet roads — reduce speed, double following distance.
- Highway / freeway — merging, lane changes, speed adjustments.
- City traffic — parallel parking, one-way streets, navigating tight turns.
- Bad weather — supervise, don't outsource to driving school. Real winter conditions matter most.
What gets a teen kicked back to permit stage
- Any traffic violation — speeding, running a stop sign, etc.
- At-fault accident
- Cell phone violation
- Curfew or passenger limit violation
Most states reset the GDL clock entirely for serious violations.
Per-state specifics
GDL rules vary too much by state to list every variant. Check your state's official driver handbook for exact:
- Permit age + holding period
- Required supervised hours
- Curfew window and passenger limit
- Stage-2-to-3 transition requirements
Insurance impact
Teen drivers add 80-150% to family auto insurance premiums on average. Discounts available:
- Good Student Discount — 5-15% off for B+ average.
- Driver education discount — 5-10% off for completed driver's ed.
- Safe driver tracking — apps like Progressive Snapshot can knock off another 10-15%.
Practice tests for the permit
Start with our state-specific practice tests — your teen should hit 90%+ on practice before booking the real test. Track misses in the Challenge Library.
Good luck — driving is freedom, but the GDL years build the habits that prevent the worst statistics.