PUBLIC LAWS--CH. 324 -JULY 25, 1947 survey, involving surveys, plans, engineering, and economic investiga- tions of projects for future construction in the District of Columbia, 52 Stat. 636; 53 Stat. as provided for under section 10 of the Federal Aid Highway Act of 1938, and in connection with the construction of Federal-aid highway 523U.S . C. 41b. projects under section 1 (b) of said Act, and highway structure projects inanced wholly from the highway fund, this appropriation shall be available for the employment of engineering or other professional 41U.S.C. 5. services by contract or otherwise, and without regard to section 3709 of the Revised Statutes and the civil-service and classification laws, 60 tat.c80. and section 15 of the Act of August 2, 1946 (60 Stat. 806), and for Street-railway pave- engineering and incidental expenses: Provided further, That this ments. appropriation shall be available for the construction and repair of pavements of street railways in accordance with the provisions of the D.C. Code 7-604 . Merger Act (47 Stat. 752), and the proportion of the amount thus expended which under the terms of the said Act is required to be paid by the street-railway company shall be collected, upon the neglect or the refusal of such street-railway company to make such payment, from the said street-railway company in the manner provided by 0 SatO.o 7-604 . section 5 of the Act of June 11, 1878, and shall be deposited to the credit of the appropriation for the fiscal year in which it is collected: paissessments org Provided further, That assessments in accordance with existing law shall be made for paving and repaving roadways, alleys, and sidewalks where such roadways, alleys, and sidewalks are paved or repaved with Contracts. funds herein appropriated: Providedfurther, That in connection with projects to be undertaken as Federal-aid projects under the provisions 5 Stas. 8 08. 63 of the Federal Aid Highway Act of December 20, 1944, the Com- missioners are authorized to enter into contract or contracts for those projects in such amounts as shall be approved by the Public Roads inOad-erossingelm- Administration, Federal Works Agency: Providedfurther, That this appropriation may be used for payment to contractors and for other expenses in connection with the expense of design, construction, and inspection of grade-crossing elimination and other construction projects 23U. S. C. §24a. authorized under section 8 of the Act of June 16, 1936 (49 Stat. 1521), 52 Stat. 633. 23U.S.C. §41b. and section 1 (b) of the Federal Aid Highway Act of 1938, pending reimbursement to the District of Columbia by the Public Roads Admin- istration, Federal Works Agency, reimbursement to be credited to Widths of sidewalks fund from which payment was made: Provided further, That the and roadways. Commissioners are authorized to fix or alter the respective widths of sidewalks and roadways (including tree spaces and parking) of all highways that may be improved under appropriations contained in Open competition this Act: Provided further, That no appropriation in this Act shall for street-improve- ment contracts. be available for repairing, resurfacing, or paving any street, avenue, or roadway by private contract unless the specifications for such work shall be so prepared as to permit of fair and open competition in paving Liabilityforrepairs. materials as well as in price: Provided further, That in addition to the provision of existing law requiring contractors to keep new pave- ments in repair for a period of one year from the date of the completion of the work, the Commissioners shall further require that where repairs are necessary during the four years following the said one-year period, due to inferior work or defective materials, such repairs shall be made at the expense of the contractor, and the bond furnished by the contractor shall be liable for such expense. Ante p,.a. Department of Vehicles and Traffic (payable from highway fund): For expenses necessary for the Department of Vehicles and Traffic, including purchase, installation, modification, operation, and maintenance of electric traffic lights, signals, controls, markers, and directional signs; purchase of motor-vehicle identification number Parkin meters. plates; installation, operation, and maintenance of parking meters UoTraffcsaletyeduca on the streets of the District of Columbia, $20,000 for traffic safety 442 [61 STAT.