encyclopedia

SERIAL LINE INTERNET PROTOCOL

Dial-up Internet connection speaking in Transmission Control Protocol/Internal Protocol (TCP/IP) protocol.

SERVER

In a network, a host data station that provides facilities to other stations.

SERVICE (SERVICE APPLICATION) BRAKING

In rail operations, retardation produced by the primary train braking system at the maximum rate of retardation regarded as comfortable for repeated use in service stopping. (TRB)

SERVICE AND METHODS DEMONSTRATION PROGRAM (SMD

A program established and overseen by the Urban Mass Transportation Administration and the Transportation Systems Center in which transit innovations are developed, demonstrated, and evaluated for their potential in providing improved transit service. (TRB)

SERVICE AREA

1. The jurisdiction in which the transit property operates. 2. The geographic regional in which a transit system provides service or that a transit system is required to serve. (TRB) Also see Coverage Area.

SERVICE ATTRIBUTES

Those aspects of a transportation system that affect travel decisions about its use, such as travel time, reliability, comfort (e.g., crowding, standees), cost, ease of use, and safety. (TRB)

SERVICE AUTHORITY FOR FREEWAY EMERGENCIES (SAFE)

The SAFE revenue is based on a $1 annual surcharge on each motor vehicle registration in Los Angeles County for the Metro Callbox System. Cost estimates and assumptions are based on the SAFE ten-year Financial Plan and are divided into…

SERVICE CALLS

Request submitted to the division of infrastructure to have work performed on a regular basis.

SERVICE CHANGE PROGRAM

A report prepared by the Scheduling Department that documents schedule and route changes to be implemented, usually in conjunction with shake-ups. Also see Shake-Up.

SERVICE DELIVERY AREA (SDA)

A Service Delivery Area represents a geographical area where job training programs are conducted. (APTA)