Please remember this is a quick-n-dirty demo.
Hover over the “Red Centre” or “Brisbane To Cairns” routes, notice the URL in the notification-bar will change:
NOTES from Brian:
This map/area/shape element is governed by HTML – not CSS
CSS has the things like ‘change background on hover’, HTML does not.
So we cannot highlight the routes when the mouse hovers over them without going further, and introducing some jquery, but that is possible.