A great improvement over Construction Site Tag Zonr_0, but still needs a lot of work.
A few suggestions:
Make your checkpoints visible - even a portapotty on either side of the track would work
Get some decent corners - if you go to the Textures page on this site there's a whole bunch of stock and custom textures and patterns ready for use. Just download 'em and extract them to your Traxx folder. You will then have ready-made corners that you can just cut and paste into your track (in Traxx go to View/Patterns and look for the files with a .txp extension).
A few hills/bumps and dips would make it more interesting - and banking the corners would help to keep the trucks on the track.
I haven't looked at this track in Traxx yet but it looks like you got the race segments nailed OK.
Hope this helps. Keep at it
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Keep on Monster Truckin'
EmceeMart