Tonight/Tomorrow’s snow could be the subway system’s first test of 2008. Wet weather tends to cause massive cluster f*cks on most lines.
All it takes is a hold up ad ONE point on a line, and the entire line suffers. So what do we hope to avoid?
Snow in general isn’t an issue most of the time. It’s when it melts. So the first thing we are looking to avoid is having a lot snow fall, and then melt all at once. When it melts fast, it causes flooding because the system can’t handle all of the water at once. So that can cause issues with signals shorting out, or third rails being under water.
The other scenario of disaster is if the snow falls as a slushy mess and then freezes. This can cause some slipping issues on the areas of track that are above ground. Eventually, a very thin, very slick layer of ice forms on the rails. Trains try to stop and slide. Or the reverse happens. Trains try to move and the wheels slip.
So I guess it is just wait an see. Be careful, that first step can be a…