616 LAWS OF MARYLAND. [CH. 224

duty to drive with due regard for the safety of all persons
using the highway nor shall it protect the operator of any such
vehicle from the consequence of an arbitrary exercise of such
right of way. Upon the approach of any ambulance or police
or fire department vehicle giving audible signal by bell, siren
or exhaust whistle, the operator of every other vehicle shall
immediately drive the same to a position as near as possible
and parallel to the right hand edge or curb of the highway,
clear of any intersection of highways, and shall stop and re-
main in such position unless otherwise directed by a police or
traffic officer until the ambulance, police or fire department
vehicle shall have passed. It shall be unlawful for the oper-
ator of any vehicle other than one on official business to follow
any fire apparatus traveling in response to a fire alarm closer
than six hundred feet or to drive into or park such vehicle
within six hundred feet to the place where fire apparatus has
stopped in answer to a fire alarm.

The State Roads Commission is hereby authorized and di-
rected to designate main traveled or through highways by erect-
ing at the entrances thereto from intersecting highways signs
notifying drivers of vehicles to come to a full stop before enter-
ing or crossing such designated highway, and whenever any
such signs have been so erected, it shall be unlawful for the
operator of any vehicle to fail to stop in obedience thereto,
except when traffic at such marked intersection is controlled by
traffic signals or officers. All such signs shall be illuminated at
night or so placed as to be illuminated by the headlights of an
approaching vehicle or by street lights. The operator of a vehi-
cle entering a highway so designated shall yield the right of
way to all vehicles approaching on such highway, provided
that at the intersection of two highways so designated, all
vehicles shall have the right of way over other vehicles ap-
proaching on the intersecting highway from the left and shall
give right of wary to those approaching from the right; pro-
vided, however, that within the limits of Baltimore City, the
designation and marking of such main traveled or through
highways shall be made by the Police Commissioner of Balti-
more City.

No ordinance, rule or regulation of any municipality or
county shall change or abrogate in any way these provisions
of the General Law with reference to right of way, even though
any such ordinance be an attempted exercise of the Police
Power delegated to such municipality or county.