According to a post of the Maine DOT Facebook page, there's a change coming to Exit 109 of I-95.

Starting Tuesday, October 16th, southbound traffic on Exit 109 will yield to northbound traffic.  Currently, the opposite is true.

The change is due to the fact the amount of northbound traffic is greater than the amount of southbound traffic.

As it will likely take time for people who regularly use this exit to become accustom to the change, please drive with extra caution.