The problem with those police three wheeled things (T3) is that they are too wide. Both people on foot and cyclists are narrower than the T3, thus perps still have the ability to "outrun" the T3 by simply going through narrow areas, such as through fences and between cars. The 1.5 hour run time rather kills "day long patrols."

The speed is a positive, as is the no emission, and they no doubt run quietly.

What your local cops need is a multi-media approach... patrols on bicycle, responses on T3, and probably off road motorcycles. The T3 is probably good for showing presence, and maybe some sort of crowd control... but that 1.5 hour runtime is just terrible.