HERBERT R. O'CONOR, GOVERNOR. 831

by a police or traffic officer until the ambulance, police or
fire department or salvage corps vehicle shall have passed.
It shall be unlawful for the operator of any vehicle other
than one on official business to follow any fire apparatus
traveling in response to a fire alarm closer than six hun-
dred 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
directed to designate main traveled or through highways
by erecting at the entrances thereto from intersecting
highways signs notifying drivers of vehicles to come to a
full stop before entering or crossing such designated high-
way, 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 ap-
proaching vehicle or by street lights. The operator of a
vehicle 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 des-
ignated, all vehicles shall have the right of way over other
vehicles approaching on the intersecting highway from
the left and shall give right of way to those approaching
from the right; provided, 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 Baltimore City.

No ordinance, rule or regulation of any municipality
or county shall change or abrogate in any way these pro-
visions 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.

The operator of a vehicle about to stop or turn to the
left shall give a signal to those behind by extending or
raising the hand, or by a suitable mechanical device.

No vehicle of any kind or description shall be parked
with any of the wheels thereof on the paved or improved
part of any public highway of this State, outside of the
corporate limits of any municipality, at or near the top
of any hill, nor near, on, or within any curve, where the
view to the front or rear for the entire width of the
improved part of said highway is obstructed within a dis-
tance of two hundred feet in either of said directions nor
shall any vehicle of any kind be parked on the improved