Exits at Harlem Avenue (exit 21B) and Austin Boulevard (exit 23) are left offramps and onramps, causing backups as trucks switch lanes to exit, and a large volume of traffic enters on the left side of the highway.
Exits at Harlem Avenue (exit 21B) and Austin Boulevard (exit 23) are inverted SPUIs, with left offramps and onramps. These cause backups as trucks switch lanes to exit, and a large volume of traffic enters on the left side of the highway.