What does NRW mean on some cycling routes in Cologne, Germany?

I am trying to find a cycle friendly route in Cologne to take me from Hotel Motel One, Mediapark to the Hauptbahnhof. The route plotted indicates NRW on some of the directions. These could be to do with one-way streets for vehicles but not bicycles. Please could you clarify for me? Thanks. Tandemtim

Fenny Castle Tea Rooms

This popular stop has unfortunately closed.

However I can reccomend the Wookey Hub as an excellent cycling stop opposite the church in Wookey outside Wells to the west.

track colouring

Please can you tell me the significance between a blue coloured track and a green coloured track?

Thanks, Tandem tim