Pouvoir Cadien

When you say "most" are you referring to subdivision streets or higher traffic collectors and arterials? Interstates? 94% of paved roadways in the US are surfaced with asphalt concrete. Portland cement concrete is typically used on heavy truck routes or intersections.

Edge/corner cracking on local streets with PCC is often caused by under designed or under constructed slab thickness. People underestimate the weight of fully loaded garbage trucks, debris vehicles, and concrete trucks. Differential settlement along the edge is usually a result of insufficient shoulder/curb tie-in. Faulting between slabs is caused by water intrusion and the pumping of fines from under the joint.

Many development contracts require the developer to repair the roadways within the development at the end of the last phase of construction. PCC may be selected as a means to get through construction without have to rebuild the road. Whether the developer chooses AC or PCC, it is often under designed for the subgrade/base materials.

Toll roads are usually not solely private ventures. The ones that are typically fail.

My Rhodesian female eats 8 cups a day. Can still see her ribs.

Does anyone in this thread know how the transportation trust fund works? The portion of the gas tax that DOTD receives currently goes into the fund. It cannot be used for anything else (i.e. "lining politicians pockets"). The state police can tap into it, but thanks to the voters a couple of years ago, the amount was significantly limited.

So an increase in the gas tax that is dedicated to roads and bridges would go directly into the transportation trust fund, which, constitutionally, can only be used for transportation.

I'm assuming your professor was referring to gravel aggregate. Mississippi, particularly in southern Mississippi, typically uses natural gravel which is fairly absorptive. Natural gravels and sands are rounded on the surface and therefore need further processing (i.e. crushing) to provide angularity.

Or he could just become a professor...

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which ones?

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BS Eveg, BSCE, MSCE, Phd CE.

I've taught courses in ME, CE, and Eveg. A couple of the advanced CE materials courses (7000 level) are the hardest in the university. Often a combination of CE and ME phd students.

In response to why cant dotd do this in the winter and at night...you can't lay asphalt when the temperature is under 50F in the shade.