My husband and I were towing our 40ft 5th wheel on...

My husband and I were towing our 40ft 5th wheel on route 115 on 9/5 at approximately 3:00pm We were in the right lane going 55 mph. We passed two separate signs directing the left lane to merge into one lane. We kept our speed consistent and that's when bus M1403 sped up and merged into our lane pushing us off the road. This driver was aggressive and negligent.