It shall be unlawful for any person to operate any motor vehicle, not running on fixed
tracks, for the transportation of passengers or property for hire, between fixed termini,
or over a regular route even though there may be periodic or irregular departures
from said termini, without executing bond or providing insurance as provided in this
section, except such taxicabs or motor vehicles as are operated principally within
the limits of one municipality where, by ordinance, a bond or insurance policy is
required, and has been executed as indemnity for the protection to the public for
injury to persons or property.