I see. Here is the law on pay and overtime in your situation. You are supposed to be paid your hourly rate of pay for all travel time that is "in a days work". So if you normally work 7am to 9pm, you should be paid for that time, and if that brings you into overtime (i.e. more than 40 hours) for the workweek, then you should be paid overtime. You add the fact that you are actively driving, and what this means is you are actively working (you aren't just a passenger in a bus for instance). So, you are supposed to be paid for all the time you are personally driving and, again, if that makes your hours greater than 40 for the workweek, then you should be paid overtime.
What can you do about it. The Fair Labor Standards Act
) is the law that controls this. You may file a charge with the Department of Labor
or hire your own attorney to pursue a claim. You'd be owed past due compensation and overtime, liquidated (double) damages and attorney fees for up to 3 years back. The employer cannot retaliate in any way against you for filing charge or lawsuit. If you are, that alone is a FLSA violation. To be sure if you do take action, the employment relationship isn't going to be great after doing so; the employer will look for a legal way to terminate your employment. Employees are hesitant to file charges while working because they don't want to make waives, and they most often wait until they find new employment to file charge or lawsuit.
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