This question got me thinking. I remembered that Ivanova once said (I think it was in S02E23)
Ivanova: "He's almost weightless but the ground rotates at 60 miles per hour."
In that scene they were standing on the inside of the cylinder, meaning on the "uppermost" deck. If we assume earth gravity on that deck and then calculate the radius via centripetal force:
F = m * v² / r
G = m * g
F = G
g = v² / r
r = v² / g
r = (60 mph)² / 9.81 m/s² ~ (26.8 m/s)² / 9.81 m/s² = 73.3 m
That would be rather narrow considering the total length of 5 miles / 8 km (a 50 : 1 ratio length to diameter). So the station would have hydroponics and the innermost decks still at a lower force. Also the outermost decks will have higher gravity (they rotate at the same angular velocity, so every meter outwards increases the artifical gravity).
So what diameter has the station and what ist the gravity level inside Babylon 5 on the inner and outermost decks? Or is Ivanova's sense of speed just plain off?