Contact US

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!

*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

Min vertical and horizontal curves

Min vertical and horizontal curves

Min vertical and horizontal curves

Designing a 7000' private access road to a energy facility to be used by tractor trailers hauling fairly heavy loads.   Would it be preferable not to use minimum vertical curve k values and minimum horizontal curve radius due to the vehicles using this road?

RE: Min vertical and horizontal curves

Minumum k values are based on stopping sight distance, not the size (or clearance) of the vehicle.  If you use the minimum k-values the tractor trailers will have no issues with clearance (if that's what you were asking).

If you are concerned with stopping sight distance, due to the slower deceleration of these vehicles, then you should determine the stopping sight distance of these vehicles and adjust you k-value accordingly.

And depending on your design speed, the miniumum horizontal curve radii may require that you widen the road surface in the curves to accommodate the larger turning movements.   

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close