Here in the UK all that is needed it seems is a pot of white paint and a bike symbol.
Here are a selection from the centre of Leamington
Here just around the corner is a special lane for those wishing to try cycling over cars.
The Parade should of course be pedestrianised and this was discussed about 9 years ago when a considerable sum of money was made available for improvements to help "vulnerable road users" - walkers and cyclists. After many fraught meetings the town traders convinced the authorities that trade would suffer and the money was spent on widening the pavements, some speed tables and the cycle lanes!
Did you notice the lack of bicycles - I wonder why?
In Assen where there is no space for seperate facilities they use either bicycle roads where the only cars are those going to properties on the road and there is no through way, making for very little traffic or have two cycle lanes one on each side of the road and with no centre line in the road. Cars can drive in the cycle lanes when there are no cyclists and pull out to overtake any cyclists they catch up. However, as the road width is such that if a car is coming the other way they cannot pass one another so they must wait behind the cyclists until it is clear.
Did you notice the number of bikes compared with Leamington?