 Going on for several long hours. It has led to a long backup. There have been a couple secondary incidents in the backup back in Woodbridge, but that's not the big deal. It is the bottleneck at mile marker 168, and only two right lanes are getting by. Southbound minor rubbernecking delays. 66 westbound, heavy in Centerville, and getting some relief out in Markham. The vehicle fire extinguished and cleared near Linden.