Flipping - mileage as cost basis?

[David Burns]

I'm a relative novice investor but I have done several flips and currently have one rental.  I do my own taxes but have always struggled with where/how to expense mileage to and from the properties I'm working on.  I always use schedule D for the properties because I only do one or two a year plus I have a full time job in addition to the flipping.  How should I account for the mileage?  Is it added to the cost basis of the property?  Thanks in advance for your help.