Which is More Important for Spectrum Policy: the FCC or USDOT?

[SOURCE: Truth, Justice, and Telecom Policy AUTHOR: J.H. Snider]
Which has more influence on spectrum policy: the FCC or the various federal, state, and local departments of transportation? If current technological trends continue, the departments of transportation, especially the United States Department of Transportation (USDOT), could end up a strong second. In 1999, the FCC allocated 75 MHz of dedicated spectrum for Intelligent Transportation System (ITS), and in December 2003 it adopted service rules for the band, called Dedicated Short-Range Communications Services (DSRC). ITS uses a band a spectrum close to that used today for WiFi networks and one might ask why USDOT needs a dedicated short-range communications services band for ITS when unlicensed could do the same job. if the government spends $3 to $10 billion dollars developing this ITS network beginning around 2009, why doesn't it add WiFi functionality on the adjacent 5 GHz unlicensed band for a very modest additional expenditure? Second, the entire world is moving to short-range wireless networks because that is the only way to achieve super high speed broadband speeds with high quality of service. Why should we be banning exactly the type of roadside broadband network architecture for mobile Internet service that clearly uses the spectrum most efficiently and is the most technologically advanced?
http://quixote.blogs.com/telecompolicy/2006/01/the_federal_com.html