35250.  No vehicle or load shall exceed a height of 14 feet measured
from the surface upon which the vehicle stands, except that a
double-deck bus may not exceed a height of 14 feet, 3 inches.  Any
vehicle or load which exceeds a height of 13 feet, 6 inches, shall
only be operated on those highways where deemed to be safe by the
owner of the vehicle or the entity operating the bus.



35251.  (a) A boom or mast which is designed to be raised and
lowered by hydraulic mechanisms and which is a constituent part of or
an attachment to a vehicle or machine, shall be securely chained or
otherwise restrained to ensure compliance with Section 35250 while
the vehicle or machine is being transported as a load or driven upon
any highway.
   (b) Subdivision (a) does not apply when the configuration and
design of the hydraulic boom effectively restrain the movement of the
boom during transit.



35252.  (a) A pilot car may operate a vertical clearance measuring
device with a height in excess of 14 feet when escorting a permitted
overheight load.  The pilot car may also operate the vertical
clearance measuring device when surveying a route for a permitted
overheight load.
   (b) Any vertical measuring device used by a pilot car shall be
designed and operated so as to avoid any damages to overhead
structures.  The measuring device shall be securely affixed to the
pilot car, and shall be operated in a manner that does not create a
hazard to surrounding traffic.
   (c) The operator of the pilot car shall not reduce the vehicle's
speed more than 20 miles per hour below the posted speed limit on the
roadway to measure overhead clearance, nor exit the vehicle to
measure the clearance of overhead structures from a vantage point on
or above the roadway.