Annual winter season, on-street parking regulations begin December 1 and are in place through April 1.  The regulations require parked vehicles to be altered daily from one street side to the other, between 2:00 A.M. and 6:00 A.M., with parking permitted on odd-addressed sides on odd-numbered dates (beginning at 12:00 midnight) and on even-addressed sides on even-numbered dates. On-street parking is prohibited within the Central Business District from 3:00 A.M. to 5:00 A.M., daily.  Public parking lots may be used.  Additionally, parking is not permitted on curb lawns or in unimproved yard areas, and vehicles cannot obstruct sidewalks, nor can vehicles be parked to straddle curbs or in areas where curbs must be mounted to park vehicles.