GDL Framework

  • About
  • Modules
    • The Issue
      • Magnitude and characteristics of young driver crashes
      • Effectiveness of GDL programs
      • Status of GDL programs and driver education
      • GDL Framework
    • GDL Framework
      • Developing the evidence-based for the GDL Framework
      • Structure of the GDL Framework
      • Developing an implementation strategy for the GDL Framework
      • GDL Framework components
    • Components
      • GDL for all novice drivers younger than 21
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support applying GDL to novice drivers younger than 21
      • Learner holding period of 12 months
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support a learner holding period of 12 months
      • 50+ supervised hours of practice & log book requirements
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support applying increased supervised driving hours and a log book
      • Night restrictions starting at 9 or 10 pm
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support an earlier start time for the night restriction
      • License plate identifiers (decals) for initial license holders
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support license plate identifiers
      • Phase 1 driver education
        • Description and rationale
        • Key research findings
        • Current implementation status
        • Implementation activities
        • Tools to support phase 1 driver education
      • Minimum entry age for learner stage
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Minimum entry age for intermediate stage
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Minimum length in intermediate stage
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Number of young passengers allowed in the intermediate stage
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Minimum exit age
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Seat belt use in learner and intermediate stages
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Cell phone use in learner and intermediate stages
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Alcohol use by supervising drivers
        • Description and rationale
        • Key research findings
        • Current implementation status
      • Modify current tests to move from learner to intermediate license, add exit tests
        • Description and rationale
        • Key research findings
        • Current implementation status
      • In-vehicle monitoring
        • Description and rationale
        • Key research findings
        • Current implementation status
    • Implementation
      • Checklist
    • Resources
      • Reports
      • Studies
      • Website Links
  • Glossary
  • References
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The Issue

GDL Framework

Components

Implementation

Resources

Home / Modules / Components / Alcohol use by supervising drivers / Key research findings

Key research findings

  • Although this policy makes sense on logical grounds given the important role of the supervisor in guiding practice driving, compliance with the restriction and its safety effects have not been established.
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