Meaning of Half-Arrow Symbols Along Roads on Nav System

Discussion in 'Gen 4 Prius Main Forum' started by DAlexNagy, Mar 21, 2019.

  1. DAlexNagy

    DAlexNagy Junior Member

    Joined:
    Jan 15, 2008
    3
    0
    0
    Location:
    Central OH
    Vehicle:
    2007 Prius
    The navigation system on my 2017 Prius shows a half-arrow type of symbol along roads. This arrow points in the direction of travel on that road. There may be pairs across from each other or not and the frequency may be many or just a few. I've attached a photo of my map displayed while driving near my home and you can see these half-arrow symbols along the roads - look just south of where my current location is marked.

    We thought the symbols were an indication of traffic density but this doesn't fit reality as we are driving along. We also thought they might show culverts or bridges on the road but again, we can't match them to road features.

    Anyone have any ideas what these half-arrows along the roads mean on the map display?

    Thanks!
    Dave
     

    Attached Files:

  2. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    4,918
    6,090
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    The color indicates traffic congestion like with Google maps and I assume the arrows represent traffic direction. It's on page 220 of the 11.6" display manual (OM47D75U.pdf)
     
    #2 jerrymildred, Mar 21, 2019
    Last edited: Mar 21, 2019
    padroo likes this.
  3. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    38,776
    10,070
    40
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    The green and yellow arrows in your screenshot indicate traffic flow (not density). It may not always be accurate but at least it gives you an indication.

    And I know you didn't ask, but the dots in the middle of the road is your "cookie crumb" feature that you somehow turned on. This allows you to backtrack if you need to (e.g. travelling on a road where navigation doesn't have guidance or road mapped... like a forestry road or off-road... remember this nav is also used in the 4Runner)
     
    tucatz likes this.
  4. VTBIGDOG

    VTBIGDOG Active Member

    Joined:
    Dec 21, 2016
    176
    129
    0
    Location:
    USA
    Vehicle:
    2017 Prius Prime
    Model:
    Prime Premium
    You can turn both of those off in the setup screen


    Posted via the PriusChat mobile app.
     
  5. DAlexNagy

    DAlexNagy Junior Member

    Joined:
    Jan 15, 2008
    3
    0
    0
    Location:
    Central OH
    Vehicle:
    2007 Prius
    Thanks, all, for the replies! The fact that the arrows indicate traffic flow is kinda odd since if I'm driving, I will know which direction that traffic flows. I'll check what my settings are for the 'cookie crumbs' and traffic flow arrows. I didn't notice the 'cookie crumbs' until after an Entune and in-car software update a few months ago. Thanks!
     
  6. tucatz

    tucatz Active Member

    Joined:
    Jul 11, 2010
    377
    332
    0
    Location:
    bay area
    Vehicle:
    2016 Prius
    Model:
    Four Touring
    I thought the half arrows indicated predictive traffic congestion, vs actual reported traffic congestion. Thanks for the clarification
     
  7. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    38,776
    10,070
    40
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Sorry. Traffic flow as in rate of vehicles, not direction haha. So it goes from green to yellow to red. Red indicates “stop and go” traffic per the nav threshold. Green just means traffic is flowing smoothly and I guess close to the speed limit.

    Data comes through HD radio traffic. I believe predictive traffic (if we have it equipped) shows up if you have a My Routes set up and you want to see the traffic along a saved route. You can see current and predictive traffic in 15 min intervals.
     
    tucatz likes this.
Loading...