1. Develops 85% coefficient of friction

2. Utilizes proprietary couplling system

2. Utilizes standard AAR couplers as well as UIC, transit or other coupling systems.

3. Can accidentally derail railcar due to operator error during weight transfer.

3. Can experence tire wear due to improper operator use.

4. Drive train is non-suspended, amplifying rail movement shock loading.

4. Drive train is pneumatically cushioined to reduce rail movement shock loading.

5. Wheel base 72.5" for off-rail movement

5. Wheel base 96" for off-rail movement.

6. Requires onboard computer to maintain maximum traction

6. Direct drive requires no onboard computer assistance for maximum traction.