Its expensive as hell and it gets shopped all the time. Truckers aren't really loyal. You should have no problem getting opportunities just by cold calling. With that said your pitch should be carrier specific. Like I have access to bla bla carrier. If they don't get quotes from it already they should give you a shot. Don't waste time trying to quote the account if you don't have a competitive market. Know who you are competing against
The ones experiencing service issues which happens all the time in trucking are easy closes if you got a market.
Just a matter of catching them before renewal at that point. That's how I would approach it.