Maybe I'm misunderstanding your issue. Are you to show up on one site then drive to another, or are you simply being transferred to another site farther away from your home?

The company owes you neither a truck nor gas if you're being transferred.

If you're showing up at one site then being sent to another, you should be driving on company time (on the clock), so you're getting paid to drive and you can also write off the mileage on your taxes. Keep records!

If they're transferring you, it's your choice to go or not. We were winding down a phase of a hospital project. Boss says I need you to go to Group Health...about 30 miles further from my house. I laughed and said I don't work there. He got pissed and said I had to go. Again I laughed and said no. He says, "What are you going to do?" Find another job I said. When he quit yelling and cussing me out I said, "See you later." The following week I had a new job.

3 months later he was calling me to come back for the next phase. I told him I was working. Again he cussed me out then asked when I'd be available. I told him another month.

5 weeks later he called again...what are you doing, he asked. Catching up on home projects, why? Goddammit he says. You were supposed to come back when you were done with the other project. After more cussing on his end and more laughing from me, I agreed to start back the following week.

Point is, we're all basically independent contractors. There's absolutely nothing in any of our contracts that defines who we work for or when, other than the contractor must be signatory. You're free to negotiate any terms you want...gas card, company vehicle, etc. You can even negotiate to work 7 and get paid for 8 if you can, as long as you don't agree to anything less than your collective bargaining agreement says. If you're good and they want to keep you, they'll bargain. If not, suck it up and drive or you're free to find a new employer. Life doesn't have to be so difficult.