![](https://www.unewsuk.com/wp-content/uploads/2022/04/124167938_fire.jpg)
The route was closed in both directions for more than an hour after the fire broke out at about 10:45.
Traffic was directed away from the Calder junction as firefighters tackled the blaze in a trailer close to a slip road.
Police Scotland said no-one was hurt but the westbound carriageway was likely to remain closed for some time.
The eastbound side of the bypass has now reopened.