These N scale traffic lights are fully automated and the module can run UK and continental sequences using the the preset program’s, It is also programmable to you own settings The module can use up 4 traffic light heads 2 on each direction and extra traffic lights are available on the website See Related product box blow. Perfect for T junction and cross road applications. I have added a video link below to show them working. The unit does not require any soldering and will run multi voltage from 8-24 volts. It will also run from the DCC supply. The video shows out OO scale traffic light but the N scale one run the same This set uses a common anode ( positive) and is for use on traffic lights made with LED’s. There is a separate unit available for common cathode (negative). both unit are supplied with instructions and links to the manufactures website help pages.