Reverse speed discrimination traffic signals in Springholm: EIR release

'Please could you provide me with a breakdown of the cost of installing and operating the reverse speed discrimination traffic signals in Springholm in Dumfries and Galloway.

In particular, I would like to know:

The cost of purchasing and installing the equipment at the end of 2017

The cost of any maintenance/repairs/upgrades/improvements etc that have been carried out since then.'