Today we want to get away from the traffic in the big cities and its negative consequences for the environment and the residents.
The bike it is.
Especially the change from car to bicycle.
Those drivers are familiar with the traffic rules, they do not drive on the sidewalk but rather use for example the left turning lane at intersections.
Especially with a cargo bike they do go on the street. Probably they would like to flash there again, like with a car, to make everybody else understand why they are there and where they want to go.
Anyone who has tried to give a hand signal on uneven roads or had to wait at traffic lights may have thought about turn signals on bikes.
Many have done so in the past and some results can be found in the patent office databases.
Whether mechanical winkers or electric lights, they failed due to the effort that the driver had to spend on their use or failed while providing the energy over large lead batteries or their energy supply with side rotor dynamos.
Those days are gone.
Obviously turning signals as well as bicycle lights can be energized by built-in batteries in case separate check and charging process for front and rear light, front and rear indicators and turn signal switch are acceptable.
Such option may be sufficient for sports and occasional applications in fine weather. But for commercial applications or for general daily use of the bicycle it can't be acceptable.
Then a hub dynamo is a start. In addition a battery is favored which can be loaded over the hub dynamo.
Such battery could also supply energy at traffic lights when waiting time is long again.
In addition it could be able to provide energy for the bicycle lights for weeks when charged at electric sockets.
Such solutions is feasible when cables are fixed once on the bike frame.
They run from the hub dynamo to the control unit, from there to switch and turn signals.
Nobody wants a lot of cables on the bike or a wiring harness.
Therefore multi-core cables are used which are not thicker than a Bowden cable.
Nowadays cables can be so thin because the LED technology in the turn signals meanwhile consumes less power than for the bulbs of earlier turn signals generations.
The plug connections are integrated into the solution and protected against weather influences.
This design ensures low maintenance efforts and together with the technical parameters it meets the UN/ECE vehicles regulation No 50