east of michigan avenue, randolph street is a two-way street taking traffic to lake shore drive. just east of michigan, randolph crosses over the metra electric/south shore line and splits into two levels, an upper level (via the outer lanes) and a middle level (via the inner lanes). the upper level carries local traffic to the illinois center, aon center and prudential plaza developments, and was built in conjunction with them; it also takes traffic to the new lakeshore east development. intersections with the upper level are provided with stetson avenue (which only heads north, and only intersects westbound randolph) and columbus drive (which only heads north). the middle level, which takes traffic to lake shore drive, intersects the middle level of columbus. a lower level also exists between stetson and columbus, intersecting lower columbus (and ramps to middle columbus). the middle level east of columbus drive is known as randolph drive.