Close What it means to 'block the box' Blocking the box causes traffic that would otherwise be moving to stop. Crash Clark explains what they means. WXIA 5:46 AM. EDT April 10, 2017 TRENDING VIDEOS Video Shows Rescue of Kala Brown Doraville PD, DeKalb DA ask for public's help solving murder Nick Gordon in Florida jail VIDEO: Rookie Sean Newcomb discusses MLB debut Georgia model vanishes, body found with organs missing Mother charged in deaths of two toddlers after kids were left in hot car Friend remembers veteran skydiver killed in fall Groups clash in Piedmont Park over Sharia Law The latest on the church bus crash Victims head home and emergency crews remember deadly bus crash More Stories 3-year-old ingests meth; mom says she's clean, drugs… Aug 18, 2017, 11:15 a.m. Without a trace: Marietta woman still missing after 4 years Aug 11, 2017, 4:20 p.m. 'It's been a nightmare' | Couple stranded after… Aug 18, 2017, 4:27 p.m.