As cited before, the "tractor" needs to be heavy to aid traction.

DrRoz to ture as the running cost of empty truck are not much better than a full one and the load gives you weight over the wheels which can only aid traction.

Many highway departments are seeking alternatives or using sand to aid traction.

The grit that should have been under the wheels and aiding traction was now slick mud.

The softened shocks on launch aid the ZR1 by allowing weight to transfer to the rear, aiding traction.

Porsche chose a rear wheel drive layout and a rear-mounted transaxle for the design to help provide 48/52 front/rear weight distribution; this slight rear weight bias aided both traction and brake balance.

A similar differential was available on the rear axle to aid traction.

Special bowl and track coatings are applied according to shape size and material of the component which aids traction, damage to the product and lower acoustic levels.

The new drivetrain could direct up to 25% of the torque to the front wheels to aid traction during rear wheel slip, thus significantly improving the handling characteristics of the car.

The gravity was about a twentieth of a G and the corridors had static fields in the floor to aid traction.