That is a tough area you will need to be very aware of your surroundings.

You can look through the CompStat reports and see the major crimes.

https://www.newhavenct.gov/government/departments-divisions/new-haven-police-department/compstat-reports/-folder-77

Day time is not too bad in the past I would go to stores around there frequetnly. I go to Kevins Seafood when I travel back to New Haven.