The bicycle sounds good.

I would choose a medium-to-heavy frame (and wheeled) bike,
because it can easily take the punishment, curbs, holes, etc.
This allows many more emergency avoidance options.

Nobbie tires are Not good; they increase the work
considerably.

CTENGR,
Undoubtedly you have noticed some private security cops
(carrying real guns), riding this kind of bike and they
can really cover ground quickly.