Ok looks like signs are probably just a CYA for the city. The good thing about this trail is it's VERY wide (enough for a car) and great smooth pavement so it's not hard for guys to average 30+ mph. I personally won't be riding that fast so I'm probably not going to get a ticket and I don't mind if others move fast, just wasn't sure if this was the norm or not as it's my first time ridding a road bike on a path.
They also have a lot of dirt paths as well so looking forward to riding my hybrid from time to time in the same spot.