I was driving on the A9 at the time so exact location is hard to pinpoint. I stopped in at the next lay-by right away and from this Ive worked out where I was from google maps. Ive seen many shooting stars in the past and have some night sky knowledge ad interest but this was 'close'.It wasn't a firework for sure, travelling in the direction it was (almost horizontally) and it lasted perhaps 3 seconds it was glowing Green with a short tail.