Sign on 287N & sign on ramp from 208N to 287N have merge signs indicating merge, however this ramp & 287N do not merge, ramp becomes 3rd lane on 287. According to the MUTCD it appears a "Added Lane" Sign (W4-3) is more appropriate and the ramp should contain "Left Lane Ends" sign.
From what I gather from MUTCD:
"The Merge sign should not be used where two roadways converge and merging movements are not required."
"The Merge sign should not be used in place of a Lane Ends sign where lanes of traffic moving on a single roadway must merge because of a reduction in the actual or usable pavement width"