Posted: 06/01/2014 at 16:03
There is a noise reducing fence (acoustic barrier fence) and they do make a difference. About 8ft tall and solid wood. The cost depending on length is much higher than adding hedging. The acoustic barrier will take up little less room than a wall does.
Is it possible to build up the wall to 2 metres? That should reduce some noise and you will get used to the road noise after a few weeks.