Where it exists, night service is generally much more limited in geographic coverage than daytime services, with fewer lines and perhaps routes over different paths from daytime services; routes serving more stops than during the daytime; or the night terminus may be in a different place. Networks may run longer routes than daytime services, sometimes combining two or more daytime routes, which may use interchanges to reach the same outlying districts. Night services usually also run less frequently. For example, according to the New York City Transit Authority's Service Guidelines Manual, New York City buses are required to operate at least every 30 minutes all times except late nights. Local bus frequencies during late night times (defined as 1a.m. – 5a.m.) are required to operate at least every 60 minutes.
