” The area [of I-290] near the I-190 onramp is also confusing and the study recommends re-striping in that area.”
One of the commenters hit this one – they had restriped it when they repaved last year. THey removed the surprise merge of the slow lane on 290 and the high-speed lane on 190, gave exiting traffic a separate lane and everything (after a few days of adjustment) started flowing smoother. Then they striped it back to the way it is now and it became a free for all again.
Worcester to Leominster
Upgrades and Multiplexes
Expressway full length
The first section of 190 to open was the short part from I-290 to Exit 1, which was posted as MA 122A as early as 1966. By 1975, the state maps show a proposal for I-190. The 1979-80 map shows it under construction. The road opened in April, 1983. 
[flickr-gallery mode=”search” tags=”i 190″ user_id=”80252055@N02″]
Kurumi’s I-190 entry
 Kurumi, see link above.