Greenwave linking (GWL) also known as time
synchronisation, is the concept of
synchronising the flow of traffic (reducing
stop frequency and waiting time); so that a
platoon of vehicles can flow smoothly along
adjacent intersections. Thus, shortening
travel time and preserving the environment
from pollution caused by idling engines. PPK
has extensive experience in GWL, which has
evolved from wired communication to a
variety of wireless communication methods.
Promotes Smooth Vehicle Flow Through Signalised Intersections
GWL implementation requires junction
studies in order to analyse the arterial traffic
flow and its demand at various peak hours
throughout the day. The collected data will
be used to determine values of significant
parameters in GWL system i.e. phase splits,
cycle time extension, linking hold, enable
and offset time.
Linking via PINTAS
Each junction to be synchronised must be
linked to PINTAS control and command
centre.
Instruction will be sent directly to each
controller to initiate the synchronisation.
Linking via RF
Each junction to be synchronised is installed
with RF module and GWL card to enable
communication between junctions.
The RF range is up to 2 km line of sight (LoS).
Repeaters can be added if there is a
limitation in LoS or if longer range linking
is required i.e more than 2 km distance
between junctions.
Linking via GPS
Each junction to be synchronised is
installed with GPS module which
synchronises the clock of the controllers
and activates linking based on pre-set Multi
plan timings.
