I am an owner operator OTR truck driver. I actively worked 269 days in 2018. I live in my truck but keep a permanent address in Oregon. How do I deduct meal expenses?

I keep reading conflicting information about meal expenses in 2018. 

I am an owner operator semi truck driver who works over the road, lives in the truck, has a permanent address in Oregon. I worked about 269 days last year with the rest of the days either spent not working but living in the truck or in a hotel.

Do I qualify for DOT meal expense deductions? 

If yes, how do I calculate that?