At Riverside the D line runs out of track and a few thousand people cross a lot and a sidewalk every weekday to start the day. C-R Landscaping thinks in exactly those terms: drives, lots and walkways that have to be open before anyone arrives. In winter that means plowing, shoveling doorways and stairs, and salting the glaze that river air lays down overnight. In the green months it means mowing, edging, trimming and the seasonal clearings that keep a property looking cared for from the road. The two halves of the year are really one job, which is making the way through.