There definately is should be lines drawn. Rigs are bigger and more powerfull. The problem is where to draw the line. Our fire apparatus is governed. The rigs are not. I don't know the top speed, but it will go 80 mph(a demo rig). 10-15 mph I personally feel is acceptable. Opinions will vary. If be with people that they handle rigs fabulously at faster speeds and been with people that drove like crap going under the spped limit. I've seen speed kill in BLS transport. Going back some years a BLS transport company vehicle lost control on the Atlantic City Expressway overturning killing both employees and the patient. Witnesses said that the rig was running at excessive rates of speed. 75-80 mph. That's too much. I too used to work for a transport service many moons ago and I refused to work with someone for I was afraid to drive with him for the rate of speed he drove, would tailgate people and would even high beam them to get them out of his way. It only takes one wrong to completely wash out enomous amounts of right. People today love to focus on the negative. Think, be smart and don't give the generall public any ammunition to fire at you.