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wrongwaycorrigan t1_je4w1n3 wrote

Reply to comment by dempom in In Washington heights they tour up the roads to do work and revealed the old cobblestone beneath (184 & Pinehurst) by soylentgreenis

This is a process called asphalt milling. It is part of the regular maintenance in our street system. This is usually in preparation for fresh pavement. It's not all going to happen at once.

You can view the schedule online.

https://nycstreets.net/PavementWorks/Project/WeeklyResurfacingSchedule/M

There is nothing sad about this.

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Quietpartsaloud t1_je50p0a wrote

If we didn’t mill before paving, the streets would be thiccc

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jmartkdr t1_je62p0x wrote

By now they’d be thiccccccccccccc and you’d need to install new doors onto the street sheds.

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kennerly t1_je52cpf wrote

What's really sad is that they milled down all the corners at 193rd so now it's a struggle to get a stroller up the curb with all the rough terrain.

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-Tony t1_je607es wrote

They should have ramped it for you.

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kennerly t1_je60xdp wrote

Yeah they ramped all the other corners but decided not to do the roundabout for some reason. I'm just hoping we get repaved soon.

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grambell789 t1_je55ot0 wrote

I've been curious how they deal with manholes when doing this.

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Gfoley4 t1_je5rouo wrote

You can see in the picture they built a temporary asphalt ramp around the manhole in the center. I’m not sure the SOP for NYC in particular, but most structures have adjusting rings sitting just below the frame/lid that you see. A crew will adjust the structures in the road to the final grade before the paver comes by. This is usually a concrete patch around the structure, either on the final grade or in a layer below so you don’t see it. That way they just pave around the structure.

Sometimes they are at the same grade now and don’t need adjustment. A company I’ve worked for also had a different specification for manholes in the middle of the road - adjusting the frame downward so it’s not sticking up of the road in the interim condition - then back up again to the final elevation.

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grambell789 t1_je5sauv wrote

I'm more curious about the milling process. I've seen the machines and it just looks like a big rotor with knives - hammers on it. how to they deactivate those when that part of the rotor gets near the manhole, is there some kind of ferrous sensor? I never see a manhole battered so they must be pretty effecicent at detecting and avoiding them.

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alheim t1_je5rxaw wrote

Generally, the primary manhole has a sort of metal ring/extension on it. The extension is about the thickness of the new course of fresh assault. It can be removed temporarily to lower the height of the manhole after the street has been cut

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Panelak_Cadillac t1_je5daza wrote

Try telling the Munsters & Susies up here that. Ft. Tryon is like a retirement home-lite bitch fest now on account of the construction, whereas before when they needed to drive their Subarus up to their 2nd homes in the HV, they were complaining that someone needed to fix the road 🤷‍♂️

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oreosfly t1_je5vk6t wrote

As someone who knows nothing about repairing roads.. why do they mill the street and then leave it in that condition for weeks before repaving? Milled roads are terrible for cars, terrible for bikes, and terrible for air quality in the surrounding neighborhood.

Is there an engineering reason as to why they cannot mill on night 1 and replace on night 2? Or is it just a logistical thing?

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rioht t1_je7lgrm wrote

A bit of both. You need to be sure that all areas of the road are ready to be paved, the weather needs to be not super wet or anything, and probably logistical/contracting/regulatory stuff - did all sections get inspected, repaired, etc.

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skrrrtttonu t1_je8p0p0 wrote

Gives utilities time to check on their infrastructure before it’s repaved. That way they’re not immediately ripping shit up.

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RyzinEnagy t1_je69piy wrote

The fact that some streets go a very long time between milling and resurfacing is the sad part. Idk if it's a lack of coordination between miller and resurfacer or what...

Edit: Looking at that schedule (small sample size, I know), it contracts out some of the milling but does all of the paving in-house, so there's more milling than paving. That looks like an issue.

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