St Pete is bike/pedestrian friendly relative to other parts of Florida, and I think it's getting better. I actually think that is one reason why the area has been growing so much over the past decade. There is actually a bike trail [1], which was made by paving over an old railway track. I used to take that trail to bike to downtown, and it was extremely safe.

In contrast, I now live in a newer FL city on the Space Coast that is currently booming. Seeing all of the car-friendly development makes me cringe. Nothing is in walking distance. Traffic is terrible. A man backed into me at a stoplight. I have to take a shuttle from my company's parking lot to my building because we have to accommodate so many vehicles, despite the fact that many employees live within an acceptable biking distance.

[1] http://www.pinellascounty.org/trailgd/