I do not have a very crowded set of home screens on my iPhone, but when I want some thing on them, it is a function that I use regularly. I found it non obvious to put a San Francisco Bay Area traffic Google Map icon on my iPhone home screen.
Here is an almost quick solution:
1. Create a
Tiny URL of the target Google Map.
SF Bay Area Traffic is http://tiny.cc/gZKMO
2. Mail yourself the Tiny URL.
3. Select the URL in the email application.
4. Before Safari realizes that it is a Google Map url, touch the x on the url line to cancel the transfer to the Google Map App.
5. Touch the + at the bottom of Safari and touch "Add to Home Screen"
Name it appropriately and, there you have it, a Google Map entry on your home screen.