Page 177 - The Central Motor Vehicles Rules, 1989

RULE 115 THE CENTRAL MOTOR VEHICLES RULES, 1989 149
1

[114. Exhaust gases and exhaust pipes
114
(1) Every motor vehicle shall be so constructed or equipped that the exhaust gases
from the engine are discharged neither downward nor to the left side of the vehicle and
shall be so fitted as to allow the gases to escape to the right side or rear of the vehicle:
PROVIDED that in the case of tankers carrying explosives and inflammable goods,
the fitment of exhaust pipe shall be according to the specification of the Inspector of
Explosives:
PROVIDED FURTHER that, in the vehicles where the exhaust gases are discharged
to the right of the vehicle, slight downward angle shall be permitted, provided the
exhaust gases do not kick up any dust when the vehicle is stationary and engine running
and in any case the angle of the pipe to the horizontal should not be more than 30 degrees:
PROVIDED ALSO that where the exhaust gases are discharged to the left of the
vehicle the inclination of exhaust pipe should not cross 30 degrees in downward and 30
degrees in left direction against the vertical plane which includes the vehicle centre line,
provided the exhaust gases do not take up any dust when the vehicle is stationary and
engine running:
PROVIDED ALSO that in the case of agricultural tractors, [vertical or horizontal]
exhaust pipe may be provided and outlet of this pipe should be so directed that the
driver of the tractor is not exposed to exhaust gases by locating the outlet over or to the
side of head-level of the driver as per Indian Standards IS 12239 (Part 1):1996:
PROVIDED ALSO that in the case of construction equipment vehicle vertical
exhaust pipe may be fitted and outlet of this pipe shall be so directed that the driver of
the vehicle is not exposed to exhaust gases.
(2) On and from the date of commencement of this sub-rule, no exhaust pipe of a
motor vehicle including construction equipment vehicle and combine harvester shall
be located within a distance of 35 millimeters from the fuel line connecting to the fuel
tank and engine.
(3) The exhaust pipe of every public service vehicle shall be so fitted or shielded
that no inflammable material is thrown upon it from any other part of the vehicle and
that it is not likely to cause a fire through proximity to any inflammable material on the
vehicle.]
Emission of smoke, vapour, etc., from motor vehicles
115. Emission of smoke, vapour, etc., from motor vehicles
2
115
[(1) Every motor Vehicle, other than battery operated vehicles and tho s e
manufactured prior to the first day of March 1990, shall be maintained in such condition
and shall be so driven so as to comply with the standards prescribed in these rules.]
(2) On and after 1st October, 2004, every motor vehicle operating on—
(i) Petrol/CNG/LPG shall comply with the idling emission standards for
Carbon Monoxide (CO) and Hydro Carbon (HC) given in the Table
below:—

1 Substituted vide GSR 240(E), dt. 31-3-2021, w.e.f. 1-4-2021.
2 Substituted vide GSR 410(E), dt. 14-6-2021, w.e.f. 15-6-2021.