I was told once it’s because cities project the job to take say 5 weeks, so they rip it up the first week, leave it for 3 weeks, then repave the last week. And they do this so everyone gets a paycheck for the full 5 weeks. Surely there has to be a different reason?
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A lot of it is timing and delays. If you’re putting up a building you need to have the people and materials in the same place at the same time. But not TOO many people, or TOO much materials. Cashflow is important so you can’t really afford to buy all your materials at once and still pay workers and utilities. At the same time you don’t want workers standing around for materials that aren’t being used.
If you delay the materials to when you need them, the workers might not be available to install them. When you have the workers, maybe the materials aren’t available. You need the right materials and the right people to be in the same place at the same time. Any time any one of those is delayed, it can cause a domino effect the push back the rest of the project.
Like others have said, it’s mainly timing between two separate crews of people. There usually isn’t a mechanical reason they can’t get right on the road and repave it after milling it off. Only time there IS a reason that I can think of is when they are mixing cement powder into the ground under the road – that needs time to set and solidify before paving on it.
That being said, in my city we require the road to be fully paved within 2 weeks after its been ripped up. Every day after those two weeks that it isn’t paved incurs a fine on the contractor.
I do road construction.
95% of the time, it’s just scheduling.
Sometimes we do get everything done quickly, with crews coming in back to back, but that’s only if the contract requires it.
Otherwise, the milling crew will come first, and then the paving crew comes whenever it works in the schedule.
That also includes waiting on confirmation from the client, or an engineer’s report or some other thing that’s out of our control.
We’ve had jobs that were supposed to be done in 2 weeks, only for them to delay or postpone it, and the road staying milled for over a year.
It can be for a variety of reasons. Sometimes just scheduling, sometimes asphalt availability, sometimes damage to underlying utilities is caused or uncovered by the grinding equipment.
>I was told once it’s because cities project the job to take say 5 weeks, so they rip it up the first week, leave it for 3 weeks, then repave the last week. And they do this so everyone gets a paycheck for the full 5 weeks. Surely there has to be a different reason?
Whoever told you that is an idiot.
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