Intersection Lane Grading

[sca24580]

I'm using intersections for the first time and have 3 that are working well, except for one quadrant, shown in the attached image. I can't figure out why the grading here has gone awry. You can see it dips down to a low point three feet below where it should be. Any idea what I'm missing?

[jmayo-EE · Accepted solution]

Its' always good to plot the profile of the curb return to see exactly what is going on and confirm the design intent.

Confirm the alignment is in the correct x-y position and then make sure z is correct in profile.

If the alignment & profile look good I would check the the intersection targets and the stations for each region forming the intersection.

[sca24580]

Thanks for the tip. I removed a couple of PVI's from the profile (see image) and now the grading looks normal.