I live near Phoenix AZ. I don't know that the local governments here have done anything to make it safer for cyclist, though they have installed some bike trails. Of course if you want to visit a bike trail, you must load up your bicycle and drive twenty to forty minutes to get to one.
The problem with Phoenix and the whole county where it resides is a heavy population throughout the area but it is spread out over hundred of square miles. Everyone drives a car. Most folks here commute about 45 minutes to over an hour. At the same time we have over a million cars on the highway there are hundreds of bicyclists demanding the same rights of way. The combination is deadly and unfortunately, as everyone knows, the bicycle rider always looses.
Here is what we can do in Phoenix to make cycling work:
Register bikes just like cars and charge a road user fee (maybe $30 to 60 per year). You grumble but hear me out. There are at least a thousand cars to each bike. They pay road tax, cyclist don't. The roads are being designed for the paying customer. If cyclists are paying also, governments have no choice but make a bicycle lane, build cyclist bridges over interstate highways, make roads cyclist friendly, etc.
Employers, schools, and governments should provide incentives for people to ride their bicycles over using their cars. The government is already doing that by providing a conflict in the Middle East to drive up the cost of gasoline; however, it seems that very few people have gone to peddle power.
It would help a bunch if individual people started thinking in a socialistic kind of way when it comes to dealing with other people (I hear a chorus of political voices and their objections rising in the background). Instead of trying to one up others in one's circles by having a nicer house across town and a bigger SUV than his or her neighbor, folks should live close to their work, school and shopping. Then even if they don't always use the bicycle to go, at least they will be on the road less, reducing the amount of traffic, and therefore reducing the amount of time others are on the road and again and again.
We should study the peoples of Europe and Asia to see how they do it. There is heavy population and yet many get around on a bicycle just fine.
I miss riding my bicycle and I'm afraid I will be dead before the roads are cyclist friendly again. I hope you get to see that day while you can still ride.
Yours
Jon