I got a solution for taking up space in your truck.
http://www.opaminc.com/metal-work.htm
Safety Cone Holder
Truck mounted, these safety cone holders may be attached to the front or back of a truck. Stacked cones will stay organized and in place during transit. Made of mild steel, the holders will not break like plastic versions. Comes with four holes for easy mounting. $31 each. (quantity discount available)
http://www.opaminc.com/metal-work.htm
Safety Cone Holder
Truck mounted, these safety cone holders may be attached to the front or back of a truck. Stacked cones will stay organized and in place during transit. Made of mild steel, the holders will not break like plastic versions. Comes with four holes for easy mounting. $31 each. (quantity discount available)