I've been playing with MLCad a long time ago and I've build the highway rig from modelteam. I've got it as a kid and still have it. First I've made the truck, copied it and modified it a little bit. Now I've put them together. Hope you like it. 

Hope not the photo's are too big? For some reason I've some trouble with the upload when selecting the resolution.

Here is another shot from my MOC, actually it's a remake of the Higway rig of Model team. I already made the original in MLCad, made a copy of it and change the design a little bit.

For another truck I already build a kind of generator, powered by a engine. For this truck it was a bit too big so I removed the 'generator' part and kept only the engine block and made some changes and add some parts.

Here is the whole truck, a lowloader with the engineblock. I also add some warning flags and flashing lights on the truck itself. 
the Trailer is inpired by the model of drdesignz. I liked his trucks and trailers so I made such a trailer for my truck. I couldn't resist to add some things to it like the flashinglight, flags and some tools but I still kept it a bit 'clean'. I also added the same bumper as the rig to match.

What kind of length 6 white slope part is there on the roof? I think the clips holding the antennas collide with it?

I don't know what you mean with the slope... it's part 2875 and that part has only a ridge in the middle so above and under it there is place for ... the clips.

Meanwhile I've made some changes, some small ones but it looks better imo.

1 hour ago, neonic said:

I don't know what you mean with the slope... it's part 2875 and that part has only a ridge in the middle so above and under it there is place for ... the clips.

Meanwhile I've made some changes, some small ones but it looks better imo.

Oh right, I didn't know this part exists. Wasn't in any of my childhood sets.

Very nice. I always wanted to have that set as a kid, but never got it - I started spending on Technic and the allowance can only be spent once  I really like your update. I think the sun visor is a bit big, maybe remove the upper row of plates if possible?

Are you planning to build it? Those 6.5 (?) L bars you use for the handrails are rare, if I recall correctly. At least in LBG. And the wheels are getting more rare also. I bought a bunch of them some time ago to build a rig like this that I designed, but never got to building...

You could use LDView for making better renders, like this one:

Very nice and clean.

Well you've made it in LDD, planning on selling the file??