×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

AASHTO TURNING TEMPLATES - GENESIS ?

AASHTO TURNING TEMPLATES - GENESIS ?

AASHTO TURNING TEMPLATES - GENESIS ?

(OP)
I interested in how the templates were developed.  Specifically, for a given turning template, how fast is teh subject vehicle assumed to be traveling?  At issue is the fact that our DOT says a perticular intersection does work on paper, but trucks use it all the time.  The templates do not appear to show a vehicle 'cranking' over the wheel at a stop to make a tight turn.  Can anyone help me with this?

Thanks!

RE: AASHTO TURNING TEMPLATES - GENESIS ?

Wambus, do you mean DOT says it does not work?

There was an article in a Trasnportation Research Record about 10 years back on developing a turning template for a schoolbus. You could use TRIS Online to find the article, and take a trip to your neares university with a CE department to read it.

I don't recall anything about speeds. The part I remember is they had pipettes full of paint on the corners of the vehicle, and surveyed the paint streaks left on the pavement.

On all the turning templates I've seen, the circular arc transcribed by the outside front bumper is tangent to the approach. I would think that if the driver stopped, then turned the wheel to the stops and procieded, that there would be a break in the line.

     "...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928

"I'm searching for the questions, so my answers will make sense." - Stephen Brust

RE: AASHTO TURNING TEMPLATES - GENESIS ?

Have you looked at AutoTurn software, they may have information.  From what I remember, template trucks are going about 15 mph. The templates are conservative, you can find assumed information (like how hard they cut the wheel, I can't remember the proper term for that).  You can move the templates around and combine paths, there are some instructions in the manual. The binder here is from ITE.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources