Vintage Cable Release

Night photography, what shutter speed?
I plan on taking a series of night shots of well lit streets. I have a tripod, a vintage Minolta SRT101 camera, 10 rolls of ASA 400 film, a f1.7 lens and a release cable. What I’m asking is, what shutter speed(s) would you recommend for taking still images of lit streets with absolutely no movement present (i.e. no light trails from cars or people).
To narrow things down a little, I’d like really clear shots with minimal noise and really deep blacks to contrast the street lights.
Asking alot I know but please try and help, thanks.
This is info from my professor when we had to do our night photography assignment based on ISO 400. At film speed of 400 you will not get a grainy print. What you might need is a tripod. As for the cable release I found it useful when wanting to capture movements.
Brightly lighted downtown streets scences: 1/60 sec f/2.8
Subjects lighted by street lights: 1/15 sec f/2
Brightly lit street scene: 1/2 sec f/5.6
Cityscape @ night: 5 secs f/16
Bracket and keep notes! Goodluck!
