An example of what I am talking about is a location I drive through regularly in Belfast, Maine, where US Highway 1 and Maine State Highway 3 converge.
Route 1 is the highway coming from the overpass, and Route 3 is joining it from the right, coming into its own separate lane. Before the broken white lines begin, if you are coming from Route 3, you have a yield sign. What is the purpose of requiring anyone to yield when both roads come out into separate lanes?
I’d say it’s there to say if there is a conflict there, the fellow on Rt 1 has the right of way.
It looks like anyone in the Route 3 right lane will have to exit unless they get over in the Route 1 left lane… although the ending is kind of unclear, the two lanes just end and one middle unmarked lane continues.
Considering the googlemaps link you gave shows someone crossing over the lane divider right at the Y, I think that pretty much answers the question.
About 1400 ft past the sign the two lanes merge at the exit to Waldo Ave, so in my professional judgement I’d call it an incorrectly placed sign and a horrible striping job. They should run the #2 lane as a trap lane to the exit.