All vehicles approaching the above arteries of travel shall, before
entering the same, come to a full stop, unless otherwise directed
by an officer or signal.
The operator of any vehicle which has come to a stop as herein required
upon entering the main artery of travel, as well as the operator of
a vehicle on such main artery, shall be subject to right-of-way regulations
and shall enter such main artery of travel with caution.
Such signs and letters thereon shall be of such size and either so
illuminated at night or so placed as to be illuminated by streetlights
or headlights of approaching vehicles as to be plainly visible and
legible for a distance of 50 feet along such intersecting highway.
Any person found guilty of a violation of any of these regulations
shall be liable to a penalty not exceeding $25 for each and every
offense, and a violation of this article shall be deemed a traffic
infraction.