Sharraxaadda
An anonymous Yale student has alerted me to the fact that it is impossible to get from the Prospect/Sachem Garage to Science Hill without jay-waling. If there is enough interest in this issue, I'm sure enough grant writing talent could be amassed to dig up the $50,000–$100,000 (more or less) that would be necessary to construct the curb extensions and install the button-activated overhead LED rapid flashers that would be necessary to make a mid-block crosswalk here possible.
4 Faalladas
CT Livable Streets Campaign (Isticmaale Diiwaangashan)
I'm not sure you would need the LED flashers if you just built a ped refuge island, possibly with a raised crosswalk (i.e., traffic diverted around the center island as a chicane) as your mid block crossing. The narrow lanes involved would slow traffic down to a comfortable speed. You could also install a chicane farther up the hill to reduce speed coming into the intersection.
These are used in Hartford - I'm not sure why New Haven isn't using them.
La qiray Department of Transportation, Traffic and Parking (Isticmaale Diiwaangashan)
Anonymous (Martida)
CT Livable Streets Campaign (Isticmaale Diiwaangashan)