The key point is this revenue ruling.
https://www.irs.gov/pub/irs-drop/rr-99-7.pdf
Publication 587 and 463 are unclear on the point -- does the home have to be a principle place of business and qualify as a home office under the regular and exclusive rules before you can deduct your transportation. The publications are focused on the deductibility of the home office, and don't really say whether the home can be your principal place of business for deducting transportation if it is not also a qualifying home office. But, the revenue ruling does say that your home can be your principle place of business even if it is not a deductible home office.
