Wow, I am alarmed at the negative reaction to roudabouts, even among engineers. I suggest everyone make their peace with them: old fashioned, expensive, inefficient signalized intersections are being replaced with roundabouts every day. When my city installed its first roundabout, as expected...
Thanks all for the thoughts.
I was also considering a reverse crown approach, where the 2 pavements drain towards the center median. This would be beneficial for a number of reasons (saves inlets and pipe, etc) but I know this is not commonly done. My research shows a lot of municipalities...
Thanks cvg and Francesca,
Yes, we plan to tosoil and seed the future lane area. The grades are somewhat gentle, 4% max.
I was also trying to think of innovative uses for the future lane area, perhaps some LID stormwater treatements (grassed swale, etc) without messing up the subgrade under...
My municipality has a new 4-lane divided arterial project where we will grade now for the entire template, but only pave half of it & leave the final 2 lanes to complete in 15-20 years when the traffic demand warrrants it. This way, the right of way acquisition and rough grading is completed...
