Why must there be yet another long disruption in late night upper west side uptown A train service? It would be so much more helpful if service disruptions started AFTER midnight when there is less ridership. We just got done bearing two months of no uptown late night service and now we're expected to bear it again. This is NOT fair. What am I paying for? Do we have no voice in the matter? Not fair.
Yes you have a voice but, to the MTA a single voice just isn't loud enough to be heard.
In general terms, by 11 PM the ridership level drops dramatically which is why most projects (even weekends) start at that time. They may have also looked specifically at the level of ridership on the A at that hour and decided that the level was low enough for them to start at 11.
Also (and I may get some flack for this - but it is just my opinion) - some union rules require that the workers have time before the evenings work starts to prepare (and of course at the and of the evenings work to clean up). This cuts into the amount of time actually put into getting the work done. By starting at 11 PM, the work may actually start around 12 Midnight.
I do disagree with your inference that you won't have late night service. It will be inconvenient to be sure and maybe even a bit cumbersome - going all the way up to 125th St from 59th to get a local train downtown or going to 59th St on the local to get a train uptown. But the work has to get done one way or the other. The longer it takes to complete, the longer you will have to endure the inconveniences and the more it will cost.