Originally Posted by cat0020

Besides crossing the railroads at perpendicular angle, there is a technique to "unweight" the front wheel by accelerating quickly from near stop, low speed and using the forward momentum to get the front wheel over first.
This takes good amount of practice and likely to damage the front wheel when it hits the mark.
Practice on the grass try to get front wheel over something soft like a plastic soda bottle for a few times first before attempting actual railroad or rounded curbs.