There is a persistent need for improved tools and techniques to facilitate public involvement in transportation decision making.
Glenn Letham's blog about "anything geospatial from a GIS user for GIS users and technology professionals". It's a good place to read about trending topics, including new tools and widgets.
Nathan Yau's data visualization blog, including links to some interesting projects that visually describe trends as diverse as human migration flows, poverty rates in the United States, and the growth of stores like Walmart and Target.
Google Earth Blog
The official Google Earth blog describes product development news and the use of Google Earth in different applications.
Streets Blog Network
A meta site that serves as a national network for sustainable transport, smart growth and livable streets.