Other then the play mats their is nothing really 'new' about the sets. They use previously released buildings and vehicles/boats that have been slightly retooled or recolored. However, for newcomers to GeoTrax some of these sets have not been available for a long time and will make a welcome addition to your collection.
The sets available include the following:
* The Lumberyard
* The Gravel Pit
* The Mechanic's Garage
* The Oceanfront Marina.
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You may be able to glean a few more details by reading the Instruction Sheets for this sets:
* The Lumberyard Instruction Sheet
* The Gravel Pit Instruction Sheet
* The Mechanic's Garage Instruction Sheet
* The Oceanfront Marina Instruction Sheet
Kohls can also be a great place to find some reissued older sets like the Mt Blast Construction and Mile-High Mountain sets.