In ORD when creating Super lane lines how do you handle the lane line with a parametric constraint?. You can see by this screen shot that my ramp has a transition from a 12' lane to a 24' lane. How can the lane line follow the transition?. I thought that after I assign the Super to the corridor that the point control would follow it.
Thanks
Hi Joe, it is not necessary for the superelevation lane to match the width of the physical lane. In your case, the superelevation calcs will work just fine. I would suggest that the use of the term "lane" in the software is an unfortunate choice since it gives the impression that there must be a super lane which corresponds to each and every physical lane and to the exact width of every lane. Think of the super lanes as containers for a set of cross-slopes (which it is) and not a container for width of lane (which it is not).
In the way of illustration, imagine a 6 lane section where all three lanes on each side of centerline follow the same superelevation. The super lanes could be 1 foot wide and still function correctly.
On the opposite extreme, if these same 6 lanes compute cross-slope independently then there must be one super lane for every physical lane and for sanity sake, the width of the super lanes probably should be similar to the physical lane widths.
Robert Garrett Senior Consultant
www.envisioncad.com
Thanks Robert,
The super lane lines actually have no bearing on the actual width since the corridor will follow the point controls or parametric constraints.
Regards,
Joe Lukovits
User Since TDP in the 80's,
Vax based Unix Workstations - Interpro32,
from the Intergraph Corp.