If you’re wondering why you can’t drive on West Diversey Parkway between Pine Grove and Cambridge Avenues in Lake View, welcome to the world of tower cranes. The street is blocked so crews can utilize a pretty red Stevenson crane to assemble a tower crane at No. 508. They’ve been at it since Tuesday, so hopefully work will be completed by the end of the day Thursday. Then, and only then, can Macon Construction Group begin going vertical on Broder Properties’ 12-story, 53-unit apartment tower.