Maximum Roadway Cross Slopes at Intersections 1

[raydefan]

I am working on a residential development in Riverside County. They use the plane method to design curb returns at intersections and don't allow any grade breaks at the BCRs or ECRs. This basically makes it so that at least one direction for each intersection is superelevated to match the other. My question is what is the maximum cross slope (either up or down) I can use? The typical section is 2%. I've read that I could go up to 6%, but would like to be able to go higher if that is possible.

 

[xantics]

Hi Raydefan,

A residential hillside project, I'm currently working on has 6% cross slope maximum. This is a limitation set by the city agency reviewing our plans. I would look into maximizing your longitundinal slopes before and/or after the intersection to get the grades you need...If this is hillside development your doing, make sure you get information from the city public works and/or fire department on the maximum longitudinal slopes to use. The fire engine the city uses has a threshold on steep slopes. Hope this helps you.