Roadway Overlay
Roadway Overlay
(OP)
I have a client that wants to overlay and raise the existing asphalt roadway 2 inches. The road was surveyed and the cross slopes vary and roadway profile grades have allot of unnecessary grade breaks. The road meets minimum standards. I think if you're going to spend the money you should make the cross slopes match and smooth out the profile grade by leveling and milling instead of just laying over the existing grades???? Any thoughts??





RE: Roadway Overlay
If the road is operating satisfactorily, the benefits of improvements may not be worth the cost.
What is the condition of the existing pavement? If it is mediocre or worse, a 2" overlay will only buy your client a few years before cracks propagate through. If the road is too far gone for an overlay, you might be able to convince the owner to fix the geometry as well as the pavement.
"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail." - Wm. Phelps Eno, ca. 1928
RE: Roadway Overlay
RE: Roadway Overlay
Something to think about:
Laying two inches of new asphalt onto a curbed and guttered road fills in the gutter pan, reducing the effective curb height and quite often creating new drainage problems that weren't there to begin with. I cannot tell you the number of times I've seen paving create drainage problems in residential subdivisions, where the curb cuts suddenly become de-facto inlets and water that used to stay in the gutter pan goes cruising down driveways.
Home owners typically aren't savvy enough to realize what's caused their problem, and even if they did there's not often much recourse once the road's been paved, but it's still something a smart engineer should consider when repaving.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Roadway Overlay
RE: Roadway Overlay
RE: Roadway Overlay
I spent some time in college working in an asphalt lab, but I'm not the guy to talk to. I spent most days shaking rock and pounding out marshal pills.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Roadway Overlay
Foley7...I agree. Fix as many issues as you can within your budget.
RE: Roadway Overlay
RE: Roadway Overlay