The following words and terms, when used in this chapter, will
have the following meanings, unless the context clearly indicates
otherwise.
(1) Axle--The common axis of rotation of one or more
wheels whether power-driven or freely rotating, and whether in one
or more segments.
(2) Axle group--An assemblage of two or more consecutive
axles, with two or more wheels per axle, spaced at least 40 inches
from center of axle to center of axle, equipped with a weight-equalizing
suspension system that will not allow more than a 10% weight difference
between any two axles in the group.
(3) Commission--The Texas Transportation Commission.
(4) Daylight--The period beginning one-half hour before
sunrise and ending one-half hour after sunset.
(5) Department--The Texas Department of Transportation.
(6) Four-axle group--Any four consecutive axles, having
at least 40 inches from center of axle to center of axle, whose extreme
centers are not more than 192 inches apart and are individually attached
to or articulated from, or both, to the vehicle by a weight equalizing
suspension system.
(7) Gross weight--The unladen weight of a vehicle or
combination of vehicles plus the weight of the load being transported.
(8) Motor carrier--A person that controls, operates,
or directs the operation of one or more vehicles that transport persons
or cargo over a public highway in this state.
(9) Overweight--An overdimension load that exceeds
the maximum weight specified in Transportation Code, §621.101.
(10) Permitted vehicle--A vehicle, combination of vehicles,
or vehicle and its load operating under the provisions of a permit.
(11) Permittee--Any person, firm, or corporation that
is issued an oversize/overweight permit or temporary vehicle registration
by the MCD.
(12) Single axle--An assembly of two or more wheels
whose centers are in one transverse vertical plane or may be included
between two parallel transverse planes 40 inches apart extending across
the full width of the vehicle.
(13) State highway--A highway or road under the jurisdiction
of the Texas Department of Transportation.
(14) State highway system--A network of roads and highways
as defined by Transportation Code, §221.001.
(15) Surety bond--An agreement issued by a surety bond
company to a principal that pledges to compensate the department for
any damage that might be sustained to the highways and bridges by
virtue of the operation of the equipment for which a permit was issued.
A surety bond is effective the day it is issued and expires at the
end of the state fiscal year, which is August 31st. For example, if
you obtain a surety bond on August 30th, it will expire the next day
at midnight.
(16) Three-axle group--Any three consecutive axles,
having at least 40 inches from center of axle to center of axle, whose
extreme centers are not more than 144 inches apart, and are individually
attached to or articulated from, or both, to the vehicle by a weight
equalizing suspension system.
(17) Trunnion axle--Two individual axles mounted in
the same transverse plane, with four tires on each axle, that are
connected to a pivoting wrist pin that allows each individual axle
to oscillate in a vertical plane to provide for constant and equal
weight distribution on each individual axle at all times during movement.
(18) Two-axle group--Any two consecutive axles whose
centers are at least 40 inches but not more than 96 inches apart and
are individually attached to or articulated from, or both, to the
vehicle by a weight equalizing suspension system.
(19) Vehicle--Every device in or by which any person
or property is or may be transported or drawn upon a public highway,
except devices used exclusively upon stationary rails or tracks.
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