Whenever motor and other vehicles are operated in combination during the time that lights are required, any lamp (except a tail lamp) need not be lighted which, by reason of its location on a vehicle of the combination, is obscured by another vehicle of the combination, but this does not affect the requirement that lighted clearance lamps be displayed on the front of the foremost vehicle required to have clearance lamps, nor that all lights required on the rear of the rearmost vehicle of any combination shall be lighted.
Structure Pennsylvania Consolidated & Unconsolidated Statutes
Pennsylvania Consolidated & Unconsolidated Statutes
Chapter 43 - Lighting Equipment
Section 4301 - Promulgation of regulations by department
Section 4302 - Periods for requiring lighted lamps
Section 4303 - General lighting requirements
Section 4304 - Obstructed lights not required
Section 4305 - Vehicular hazard signal lamps
Section 4306 - Use of multiple-beam road lighting equipment
Section 4307 - Use and display of illuminated signs
Section 4308 - Lighted head lamps on school buses