Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 252 of 265
5
RLM
LMU
6
7
LMU
8
LMU
F
E
G
H
35
RLM
LMU
36
RLM
LMU
RLM
Approach 1
RLM
Approach 2
Last Phase
of the
Intersection
Stand-Alone
Pedestrian
Phase
Spare
Phase
External
Sensors
Monitoring
Disabled
Figure 46 – RLM Approaches (External Sensors)
38.3.2 Using Additional Phases (ST900 or ST900 ELV)
An alternative is to configure phases F and G as the two vehicle approaches and
phase H as the pedestrian. This would allow the on-board sensors 6 and 7 to
monitor the two approaches for red lamp monitoring and normal lamp monitoring
and not use any off-board sensors:
5
RLM
LMU
7
LMU
8
LMU
F
E
G
H
RLM
Approach 1
RLM
Approach 2
Last Phase
of the
Intersection
Stand-Alone
Pedestrian
Phase
6
RLM
LMU
7
RLM
LMU
Figure 47 – RLM Approaches (Additional Phases)
In this case, the timings for the vehicle stage would be set by phase F and thus it
would become the ‘master’ phase while phase G would become the ‘slave’ phase.
The minimum and maximum green times for phase G would be set to zero so that it
does not extend the vehicle stage, but would still terminate at the same time as
phase F at the end of the vehicle stage. The stand-alone pedestrian stream inter-