324 LAWS OF MARYLAND. [CH. 184

or other hard material upon any public road of his district
at the price paid for the same on such road or in such locality,
the County Commissioners shall give such taxpayer the pref-
erence, provided such stone or other hard material is in condi-
tion for spreading on the road when hauled, if so required by
the County Commissioners, and that its quality is approved
by the Roads Engineer for use on the road upon which it is
proposed to be used. All contracts made by the County Com-
missioners for the repair or construction of roads or bridges
shall be reduced to writing and all payments thereunder shall
be subject to the approval by the Roads Engineer of the work
done under the contract. Whenever work on any road or

bridge involves an outlay of five hundred dollars or more,
plans and specifications therefor shall be prepared by the Roads
Engineer and bids for work invited by reasonable publication
in such papers as the Commissioners may designate; but it
shall not be obligatory upon the said Commissioners to have
such work done by contract if it be found after receiving bids
therefor that the same can be done more cheaply by direct em-
ployment of required labor. The County Commissioners of
Baltimore County shall and may adopt all necessary and rea-
sonable rules, regulations and orders with reference to the
proper care, repair, improvements, construction and mainte-
nance of the county roads and bridges, and shall have power
to make all such rules and regulations with reference to the
use of the roads, streets, avenues, lanes, alleys, and bridges of
the county by telephone and telegraph companies, steam rail-
road and street railway companies, gas, water and electric light
companies, and similar uses thereof, and by individuals and
the traveling public, as said Commissioners may consider
necessary for the proper protection of said roads, streets, ave-
nues, lanes, alleys and bridges of the county and the rights of
the public therein, and impose reasonable penalties for a viola-
tion of such rules and regulations and make other necessary
provisions for the enforcement thereof, and shall have the right
from time to time to change or alter the same; and all such
rules and regulations, when adopted and recorded in a book
or books kept for the purpose, shall have the force and effect
of municipal ordinances regularly adopted by authority of the
Legislature of the State of Maryland. The police, magistrates
and constables of the county shall be charged with the duty
of enforcing all such rules and regulations; and, in addition
to other methods of enforcing all such rules and regulations;