The deep ruts between the abandoned embedded rail track and the road surface cause a major bike safety problem. The bike tires get caught in the rut causing the rider to loose control. This particular spot is bad due to the bike lane being closed during building construction. The entire length of Illinois st has abandoned track with deep ruts. You don't need to go as far as ripping out the track, just put black top in the rut to even it out with the road surface. Many riders have gone down, including myself trying to cross these tracks while riding parallel.