700 CMR 9.01
Definitions
For the purpose of 700 CMR 9.00 the words and phrases used herein shall have the following
meanings, except in those instances where the context clearly indicates a different meaning:
Bicycle. Any wheeled vehicle propelled by pedals and operated by one or more persons.
Bicycles shall include electric bicycles and motorized bicycles as defined in M.G.L. c. 90, § 1.
Bicycle Signal. A traffic signal indication at a Traffic Control Signal that is identified by a
bicycle symbol in each signal face. Bicycle signals shall control right of way for bicyclists only.
Where Bicycle Signals are present on an approach to an intersection, they shall control the right
of way for bicyclists regardless of the presence of other traffic signals, unless otherwise signed.
Bus. Every vehicle designed for carrying more than eight passengers and used primarily for the
transportation of persons either for compensation, as a service, or as an adjunct to a school
program.
Bus Lane. A Lane designated by Official Signs, Street Markings, or a combination thereof that
is restricted for the use of Buses, only. Where Official Signs designate it, Bus Lanes may be
open to Vehicles that must turn at an approaching Intersection or driveway and/or to Bicycles.
Bus Stop. An area in a roadway set aside for the boarding of or alighting from buses.
Channelizing Island. A traffic island located to guide traffic streams along certain definite paths
and to prevent the promiscuous movement of vehicles in what would otherwise be a widely
extended roadway area.
Commercial Vehicle. Any vehicle registered for commercial purposes and designed and used
primarily for the transportation of goods, wares or merchandise.
Container. Any drum, barrel, cylinder, bag, carboy or other shipping vessel (other than a tank
vehicle) used for the transportation of dangerous articles.
Crossover. An opening in a channelizing island that connects both sides of a divided highway.
Crosswalk. That portion of a roadway ordinarily included within the extensions of the sidewalk
lines, or, if none then the footpath lines, and, at any place in a highway, clearly indicated for
pedestrian crossing by lines or markers upon the roadway surface.
Curb Marking. That portion of a curbing which has been painted by the Department.
Department. The Massachusetts Department of Transportation.
Divided Highway. A highway with separated roadways for traffic in opposite directions.
(Mass. Register #1516, 3/1/2024)
Emergency Vehicle. Vehicles of the Fire Department (Fire Patrol), police vehicles and such
ambulances and emergency vehicles of federal, state or municipal departments or public service
corporations as are commonly recognized as such.
Emergency Vehicle Hybrid Beacon. A specialized Traffic Control Signal that is accompanied
by a sign stating that it is an emergency signal, that remains dark when inactive and, when
activated, provides right of way to emergency vehicles entering or exiting a roadway through
its indications.
Express State Highway. A divided arterial highway for through traffic with full or partial
control of access and generally with grade separations at intersections.
Flashing Signal. A Traffic Control Signal indication that is intermittently illuminated at a rate
of 50 to 60 times per minute.
Highway. The entire width between property lines of any state highway or lawful through way
designated by the Department.
Intersection. The area embraced within the extensions of lateral curb lines, or, if none, then the
lateral boundary lines, of intersection ways as defined in M.G.L. c. 90, § 1, including divided
ways.
700 CMR 9.00 governs and restricts the movement of vehicles on state highways at and near
intersecting ways and shall apply at any place along any way at which drivers are to be
controlled by traffic control signals whether or not such place is an intersection as herein
defined.
Lane. A longitudinal division of a roadway of sufficient width to accommodate the passage of
a single line of vehicles, whether or not such lane is indicated by pavement markings or
longitudinal construction joints.
Limited Access Highway. An express state highway with full control of access.
Officer. Any police officer or any officer authorized to direct or regulate traffic or to make
arrests for violations of traffic regulations.
Official Signs. Signals, markings and devices. All signs, signals, markings and devices installed
or maintained by the Department.
One-Way Highways. Roadways or streets, designated by the Department as one-way and upon
which vehicular traffic may move only in the direction indicated by signs.
Parking. The stopping or standing of a vehicle whether occupied or not, otherwise than
temporarily, except that a vehicle shall not be deemed parked when stopped or standing for the
purpose of and while actually engaged in loading or unloading or in obedience to an officer or
traffic control signs or signals, or while making emergency repairs or, if disabled, while
arrangements are being made to move such vehicle.
Pedestrian. Any person afoot or using a wheelchair (manual or motorized) or riding on a
conveyance moved by human power, except bicycles or tricycles.
Pedestrian Hybrid Beacon. A specialized Traffic Control Signal that is accompanied by a sign
stating that it is at a crosswalk, that remains dark when inactive and, when activated, provides
right of way to pedestrians within the crosswalk through its indications.
Roadway. That portion of a highway between regularly established curb lines or that part,
exclusive of shoulders, improved and intended to be used for vehicular traffic.
Rotary Traffic. The counter-clockwise operation of a vehicle around an island or other structure
in the highway.
Sidewalk. That portion of a highway set aside for pedestrian travel and, where designated, for
bicycle travel.
Stop Line. A solid white Street Marking line extending across approach lanes to indicate the
point at which a stop is intended or required to be made.
Stop Signal. A Flashing Red Signal having the same function as a stop sign and erected by the
Department.
Street Marking. Any painted line, legend, marking or marker of any description painted or
placed on any way by the Department and which purports to direct or regulate traffic.
Tank Vehicle. Any tank type motor vehicle with cargo tank, portable tank or bulk pyramided
cylinders, used for the transportation of liquids or gases.
Traffic. Pedestrians, ridden or herded animals, vehicles, street cars or other conveyances either
singly or together while using any highway for the purpose of travel.
Traffic Control Signal. A signal device which, through its indications, alternately controls and
provides right of way to vehicles on approaches to an intersection and which has been erected
by the Department.
Traffic Island. Any area or space set aside, within a roadway, which is not intended for use by
vehicular traffic.
U Turn. The turning of a vehicle by means of a continuous left turn whereby the direction of
such vehicle is reversed.
Urban Area. The territory contiguous to and including any street which is built up with
structures devoted to business, industry or dwelling houses situated at intervals of less than 100
feet for a distance of a quarter of a mile or more.
Vehicle. Every device in, upon, or by which any person or property is or may be transported or
drawn upon a highway, including bicycles when the provisions of these rules are applicable to
them, except other devices moved by human power or used exclusively upon stationary rails or
tracks and devices which derive their power for operation from stationary overhead wires.
Yield Line. A row of solid white triangular Street Markings extending across approach lanes
to indicate the point at which the yield is intended or required to be made.