Section 2
SEC. 2. For the purpose of determining the rates' of tolls to be charged, and the period within which such tolls should be collected to reimburse the cost of the bridge with interest of four per cent, the Director of Public Works shall take the necessary census of traffic at proposed bridge sites, which census shall be submitted to the Secretary of Commerce and Communications who shall authorize the construction of bridges in the order of the intensity of vehicular traffic as shown by said census: Provided, however, That small bridges, the cost of which may be recovered within a short period from reasonable toll fees, shall be given preference.