Access to roadway
Access to roadway
(OP)
Hi,
I have a question here. I have been trying to model the access to an existing roadway from a new one. The problem is an existing parallel canal is to remain untouched, and it leaves no room for a vertical curve overpassing with a bridge with a steep slope on a short vertical tangent conecting to the roadway (15 feet @ 13%). Is this acceptable?
Roberttx
I have a question here. I have been trying to model the access to an existing roadway from a new one. The problem is an existing parallel canal is to remain untouched, and it leaves no room for a vertical curve overpassing with a bridge with a steep slope on a short vertical tangent conecting to the roadway (15 feet @ 13%). Is this acceptable?
Roberttx





RE: Access to roadway
Boat ramps are often built on a 12% to 15% grade so the grade is not too steep to drive if it is short. But such grades may not be acceptable at a road intersection where sight distance is also a consideration.
Maybe a conversation with the agency who will review and approve your plans mught be useful ?
Another option might be to alter the existing roadway if that is possible.
RE: Access to roadway
RE: Access to roadway
KRS Services
www.krs-services.com
RE: Access to roadway
Is any of this helping ?
Is there a highway authority you must satisfy ?
The grade is steep but, is this even a highway, as KRSServices seems to think ?
Steep grades can be tolerated for short distances ( e.g in parking structures ) but not easily on "highways" or even local streets. In San Francisco people drive very steep grades with sharp "breakovers" all the time. The wear and tear on brakes, clutches, and nerves has never been calculated.
We all sure wish you could send an attachment, in the form of a simple sketch, as an attachment. Some websites do allow this.
Hope you can get it figuerd out.
Russ
RE: Access to roadway
As a matter of fact, the roadway to which I'm connecting is a TxDOT maintaned roadway and the channel is a facility by a local water district. I've figured some solutions the work this around:
-Use a series of culvert boxes to contain the flow on the channel and pass over them (this solution apparently is not supported by the water district)
-Leave the channel untouched with a small bridge connecting to the existing roadway (which leads to a steep slope into the roadway)
-Modify a portion of the existing alignment in the intersection (which usually takes more time for permission from state authorities)
I appreciate your responses.
Roberttx
RE: Access to roadway
Also check the rollover to prevent vehicles bottoming on the peak.
Good Luck
TrafficPro
RE: Access to roadway
Best of Luck,
R.A. Hassett, P.E.
rah1616@hotmail.com