You can see http://www.ieee-infocom.org/2004/Papers/08_5.PDF, which gives you some helpful information. I don't think any difference would arise between b and g in maximum vehicle's speed or roaming due to similarities in the PHY. I exepct, in genera...
I found this "academic" article interesting. It discusses testing 802.11b AP connectivity from fast vehicles on a german highway (speed from 80 to 180 km/h). It describe different behaviour when UDP or TCP is involved and gives explanation. Let me kn...
