Filtered on: Transportation_Defined

  • Transportation Defined: Mile Markers

    April 5, 2012
    These reference “posts” are set two feet off the right shoulder and are about one mile apart. Mile posts can be used to tell where you are located if you are involved in a collision, have mechanical problems, or are out of gas. If you have to stop, note the route you are on and the approximate distance from a mile post.

  • Transportation Defined: Highway Advisory Radio (HAR)

    March 1, 2012
    When you see signs directing you to tune in to a certain radio station for construction information, do you ever wonder where the signal is coming from? Chances are a nearby Highway Advisory Radio transceiver is helping to deliver the message.

  • Transportation Defined: Loops

    February 1, 2012
    There's a lot of useful information to be obtained from our roadways and loops help ADOT collect some of that data.

  • Transportation Defined: Passive Acoustic Device

    January 19, 2012
    You've probably never gotten a good look at the Passive Acoustic Devices (PAD) out on the freeways … they're easy to miss. PADs are small objects that sit near the top of utility poles and are barely visible to drivers below, but they collect a lot of useful data.

  • Transportation Defined: CCTV Cameras

    January 13, 2012
    Maybe you've noticed some of the cameras that are perched high above the roadways ... These are Closed Circuit Television (CCTV) cameras and are used by ADOT's Traffic Operations Center (TOC) to constantly monitor traffic conditions throughout the state.

  • Transportation Defined: Controller Cabinets

    January 9, 2012
    Have you ever spotted something on the highway and wondered, ‘what is that and why is it there?’ If you have, the ADOT Blog is here to help you find the answer!