1. Green wave of traffic signals
”Why on earth you can’t plan such a co-ordination for traffic signals, that you need not to stop every time in everywhere...”

2. Principle of the green wave a good co-ordination of signals makes a green wave
45 km/h
cycle time
40 s
0 s
500 m

3. Green wave for both directions possible only if the cycle time, speed and distance are OK
45 km/h
cycle time
45 km/h
40 s
0 s
500 m

4. Uncontrolled junction in the middle crossing the street impossible because of the continuous flow
45 km/h
cycle time
45 km/h
40 s
0 s
250 m

5. Green wave stops twice in the secondary direction but in the main direction the progression is good
cycle time
45 km/h
40 s
20 s
0 s
250 m

6. The green wave stops once in the both directions compromizing the green wave progression
cycle time
45 km/h
20 s
40 s
0 s
250 m

7. Half of the cycle time side street green is absolutely too short
45 km/h
40 s
cycle time
40 s
40 s
45 km/h
0 s
15 s
250 m

8. Slow down of the green wave ”in real life nobody will use such a speed”
22.5 km/h
80 s
80 s
22.5 km/h
cycle time
40 s
0 s
250 m

9. Green carpet ”the last vehicles of the green wave will cut of”
45 km/h
80 s
cycle time
20 s
45 km/h
0 s
250 m

10. What about the SYNCHRO optimization it brings minimum delays ands stops for vehicles
cycle time
45 km/h
0 s
250 m

11. ”A good but forced green wave” pedestrian must wait on refuge, vehicle must turn on right
45 km/h
cycle time
45 km/h
40 s
0 s
250 m
250 m
a right turn to the right only

12. Green wave for Mannerheimintie in Helsinki Here is the green wave, plan the opposite green wave, too
40 km/h
90 s
55 s
cycle time
0 s
Erottaja
Lasipalatsi

13. Timing of Traffic Signals
Timing of Traffic Signals ... is making compromises and balance in different directions and periods between buses, cars, pedestrians, delivery vans, cyclists, trams lorries, roll-skaters, taxis, children and pensioners, blind and invalid people and other citizens’ wishes and demands.