A snowplow remained on an active runway at Denver International Airport on Friday, prompting the National Transportation Safety Board to open its second runway incursion investigation at DIA in a month.
The plane got within 200 feet of the snowplow before it came to a complete stop
http://www.rockymountainnews.com/drmn/airlines/article/0,2777,DRMN_23912_5329979,00.html
The reporter seems to think that using brake and reverse thrusters is unusual.