Document ID: chunk:federal_register_of_legislation:F2021C00480:body:0:p11
Version: federal_register_of_legislation:F2021C00480
Segment Type: other
Provision Reference: 
Character Range: 31718–34709

retroreflective material.

Each escape hatch shall be likewise marked inside the vehicle.
44.9.5.2.                    Internal signs
         Conspicuous signs indicating the location of all emergency exits shall be visible from the 'Aisle'. The signs shall:
44.9.5.2.1.              include the word "EXIT"  in letters at least 25 mm high;
44.9.5.2.2.              be red on a white background or vice versa; and
44.9.5.2.3.              be permanently illuminated whilst the vehicle is in operation.  It shall be either illuminated or 'Self-illuminating' for at least 15 minutes after the vehicle ceases operation or 15 minutes after loss of battery power.
44.9.5.3.                    Marking of controls
         The emergency controls of 'Service Doors' and of all emergency exits shall be marked in a colour which contrasts with the background and at least 10 mm in size on 'Self-illuminating' material on the inside and on retroreflective material on the outside of the vehicle either by a representative symbol or by a clearly-worded inscription.
44.9.5.4.                    Instructions for operation
         Clear instructions concerning the method of operation shall be placed on 'Self-illuminating' material inside and on retroreflective material outside the vehicle, on or close to every control of an emergency exit.
44.9.6.                          Interior Arrangements
44.9.6.1.                    Interior access to emergency doors (see Figure 1)
44.9.6.1.1.              The free space between the 'Aisle' and the emergency door aperture shall permit the free passage to and through the aperture of a vertical cylinder 300 mm in diameter and 700 mm high and supporting a second vertical cylinder 550 mm in diameter, the aggregate height of the assembly being 1,250 mm.

It is permissible for this access to cross a 'Seat', wheel arch or similar fixture and also for the cylinders to be tilted up to 25 degrees from the vertical in order to gain access to the aperture.
44.9.6.1.2.              The base of the first cylinder shall be within the projection of the second cylinder.
44.9.6.1.3.              Where hinged 'Seats' are installed alongside this passage, the free space for the cylinder shall be required to be determined when the 'Seat' is in the position in which it can be used as a 'Seat'.
44.9.6.2.                    Interior access to emergency windows and hatches.
44.9.6.2.1.              It shall be possible to move a test gauge from the 'Aisle' to the exterior of the vehicle through every emergency window and hatch
44.9.6.2.2.              The direction of motion of the test gauge shall be in the direction in which a passenger evacuating the vehicle would be expected to move.

The test gauge shall be kept perpendicular to that direction of motion.
44.9.6.2.3.              The test gauge shall be in the form of a thin plate having a size of 600 mm x 400 mm with corners radiused by 300 mm.  However, in the case of an emergency window in the