4. APTA SS-PS-004-99, Rev. 1 Standard for Low-Location Exit Path ...

APTA SS-PS-004-99, Rev. 1
Edited 4-1-04
a) Shall be visible and provide emergency evacuation guidance for passengers under
all operating conditions for a period of 1.5 hours after all normal and emergency
lighting has ceased operation;
b) Shall provide an easily distinguishable path along the floor from all aisle seating
and compartment locations in the rail car to all of the car’s primary exits;
c) Shall include exit signs at each primary exit visible from a low-location (as
defined in 3.1.10) and from a horizontal distance of 6 feet (1.93 m) from the exit
along the exit path;
d) Shall provide readily distinguishable markings along the perimeter of the door or
door frame visible from a low-location (as defined in 3.1.10) and from a
horizontal distance of 6 feet (1.93 m) from the exit along the exit path;
e) Shall provide readily distinguishable markings on or around the door’s operating
handle.
Providing the above conditions are met, the LLEPM system may consist of either passive
(HPPL) marking materials, active (electrical) marking fixtures, or a combination of these
two systems.
5. System design requirements
The LLEPM shall identify an easy-to-follow exit path from all aisle and compartment
seating positions to the primary exits through the cars center aisle, side aisle,
passageway, and stairs. The LLEPM system shall consist of either passive (HPPL)
marking materials, active (electrical) marking fixtures, or a combination of these two
systems.
5.1 Passive marking method (HPPL)
When using HPPL marking materials as exit path marking material in rail cars, an
ambient light source must be available, (either natural and/or artificial), to provide a
sufficient charge to the HPPL system prior to the loss of the main lighting power and
emergency power systems. Annexes B and D provide the lab and field tests necessary to
demonstrate that the LLEPM meets the criteria for light output of 7.5 mcd/m 2 after 1.5
hours.
HPPL marking material may be applied on the floor or upon seat pedestals/components at
a height of not more than 18 inches (45.7 cm) from the floor on both sides, (unless
applied as a continuous strip on the floor, in which case, the LLEPM material need only
be applied to one side or down the middle of the aisle/passageway). The marking material
shall be oriented to insure that it is easily visible to passengers and crewmembers
negotiating the aisle/passageway and adequately exposed to the charging light fixtures
and/or natural light source.
The width of each marking strip shall not be less than 1 inch (2.54 cm) and may be
applied either as a continuous or intermittent strip with no uncovered interval exceeding
4.9
Volume VI - Passenger System