Here is how it works out for us, and simplifies some issues. If I leave home in my service truck and go straight to a job, I get paid from time I leave home to the job and customer pays travel time. If I go to the shop, I am like everyone else and on my time but have the benefit of company vehicle.Then I get paid from start time whether I leave right away or not. If we are more than one hour from home, we get paid for that portion of travel time unless we have worked overtime. I can stop at the store on my way home with no issues but personal use of company vehicle is prohibited.
We bring our trucks home in case we are called out after hours or weekends.
Just for the record, I live 50 miles from our shop, but do not go to the shop everyday.
There are other ifs and ands but these are the basics.