Bicycle and Pedestrian Master Plan - sacog

Right of Way—The right of one vehicle or pedestrian to proceed in a lawful manner in preference
to another vehicle or pedestrian.
Roadway—The paved portion of the highway
Roundabout—A type of circular junction in which road traffic must travel in one direction around
a central island. Signs usually direct traffic entering the circle to slow down and give the right of way
to drivers already in the circle.
Rules Of The Road—The portion of a motor vehicle law that contains regulations governing the
operation of vehicular and pedestrian traffic
SAFETEA-LU— Safe, Accountable, Flexible, Efficient Transportation Equity Act—A Legacy for
Users. SAFETEA-LU authorizes the Federal surface transportation programs for highways, highway
safety, and transit for the 5-year period 2005-2009.
Sensitivity—The setting on the detector unit that determines the amount of inductance shift
required to actuate the detector. High sensitivities require low inductance shifts.
Sensor Unit—An electrical conductor ("loop") in the roadway designed such that the presence or
passage of a vehicle causes a decrease in the inductance of the loop.
Separation—An intervening space or a physical barrier between the bike path and the roadway so
that the bike path is not contiguous to the outer edge of the paved highway shoulder.
Shall—A MANDATORY condition. Where certain requirements in the design or application of the
device are described with the "shall" stipulation, it is mandatory that these requirements be met.
Should—An ADVISORY condition. Where the word "should" is used, it is considered to be
advisable usage, recommended, but not mandatory.
Shoulder—The portion of a highway that is contiguous to the travel lanes provided for pedestrians,
bicyclists, and emergency use by vehicles, and for lateral support of base and surface courses. This is
often used in place of a sidewalk or bike lane in rural areas.
Shy Distance—The distance between the edge of a travel-way and a fixed object.
Sidewalk—A walkway separated from the roadway with a curb, constructed of a durable, hard and
smooth surface, designed for preferential or exclusive use by pedestrians.
Sight Distance—The distance a person can see along an unobstructed line of sight.
Skew Angle—The angle formed between a roadway, bikeway or walkway and an intersecting
roadway, bikeway, walkway or railway measured away from the perpendicular.
Sonic Detector—A vehicle detector that emits high frequency sound energy and senses the
reflection of that energy from a vehicle in its field.
Regional Bicycle, Pedestrian, and Trails Master Plan—Amended June 2011 E-7