 I-66 westbound traffic remains stopped between Markham and Linden. Before exit 13, the vehicle fire extinguishment continues. This is a prolonged firefight, and all westbound traffic is stopped on I-66 until authorities deem it safe enough to allow at least one lane to get by to the left. That has not started happening yet. All 66 westbound traffic remains stopped at the Fauquier-Warren County line. Dave Dildine, WTOP Traffic.