I actually take RR tracks at speed when it's wet, but I coast over the actual tracks, I just don't slow down for them. I always position myself to tackle them 90 degrees perpendicular, even if it means heading far left in the lane to get lined up. Even on my Forte SlickCity tires, RR tracks aren't a problem. It's similar to the technique I use when riding on glare ice. Don't steer, keep moving, and if you can get through the obstacle without pedaling, all the better.