i have a trakker on my van and it mainly is for insurance purposes,they only really need to do vans as they have tools in etc.

also if you ar traveling to a job and it takes you 3.5 hours instead of 2 they can see youve been sat in traffic on the m25 for a while,but there not all that good because i got back to the works and my van said i was doing 74 mph on the m62 near doncaster.