[Code of Federal Regulations] [Title 45, Volume 1] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 45CFR3.27] [Page 14] TITLE 45--PUBLIC WELFARE SUBTITLE A--DEPARTMENT OF HEALTH AND HUMAN SERVICES PART 3_CONDUCT OF PERSONS AND TRAFFIC ON THE NATIONAL INSTITUTES OF HEALTH FEDERAL ENCLAVE--Table of Contents Subpart B_Traffic Regulations Sec. 3.27 Bicycles. A person may not operate a bicycle, motorbike, or similar vehicle without a horn or other warning device, and, if the vehicle is operated between dusk and dawn, it must be equipped with an operating headlight, and taillight or reflector.