• Skip to primary navigation
  • Skip to main content
Logo

Work Zone Safety Information Clearinghouse

Library of Resources to Improve Roadway Work Zone Safety for All Roadway Users

  • About
  • Join Listserv
  • Contact
  • Twitter
  • Facebook
  • LinkedIn
  • Work Zone Data
    • At a Glance
    • National & State Traffic Data
    • Work Zone Traffic Crash Trends and Statistics
    • Worker Fatalities and Injuries at Road Construction Sites
  • Topics of Interest
    • Commercial Motor Vehicle Safety
    • Smart Work Zones
    • Transportation Management Plans
    • Accommodating Pedestrians
    • Worker Safety and Welfare
    • Project Coordination in Work Zones
  • Training
    • Flagger
    • Online Courses
    • Toolboxes
    • FHWA Safety Grant Products
    • Certification and
      Accreditation
  • Work Zone Devices
  • Laws, Standards & Policies
    • COVID-19 Guidance
  • Public Awareness
  • Events
  • About
  • Listserv
  • Contact
  • Search
Publication

MDOTs Final Report: Permission to Experiment – 6(09)-35 (E) – Driveway Assistance Device

Abstract:

On July 23, 2015, MDOT submitted a request to test and evaluate Horizon Signals Driveway Assistance Device. This full report documents MDOT projects and the findings and recommendations based on the conducted study. The five test locations have been included in detail as supplement reports to MDOT’s Final Report Permission to Experiment – 6(09)-35 (E) – Driveway Assistance Device.

A driveway assisted device (DAD) is a temporary traffic control device used to direct traffic entering a one-lane work zone from a driveway. The signal heads displayed by a DAD in normal use are solid red, flashing left arrow, and flashing right arrow. The DAD is used in conjunction with temporary traffic signals on projects maintaining one lane of bi-directional traffic.This report aims to share observations on the DAD devices on studies conducted by MDOT. From MDOT’s observation’s the DADs are meeting their intended objective of maintaining driveway traffic in a work zone operated by temporary signals.

Publisher: Michigan Department of Transportation
Publication Date: 2021
Full Text URL: Link to URL
Publication Types: Books, Reports, Papers, and Research Articles
Topics: Evaluation and Assessment; Portable Traffic Signals; Temporary Traffic Control; Work Zones

Copyright © 2023 American Road & Transportation Builders Association (ARTBA). The National Work Zone Safety Information Clearinghouse is a project of the ARTBA Transportation Development Foundation. It is operated in cooperation with the U.S. Federal Highway Administration and Texas A&M Transportation Institute. | Copyright Statement · Privacy Policy · Disclaimer
American Road and Transportation Builders Association Transportation Development Foundation, American Road and Transportation Builders Association U.S. Department of Transportation Federal Highway Administration Texas A&M Transportation Institute