es una muy buena pregunta,
segun este link
http://www.4x4training.com/Articles/...BoardRoad.html
hay que tener mucho cuidado porque es muy danino con la suspensión (cosa de mirar el tren delantero de un vehiculo en contra) y andar rapido parece aliviar el problema pero a riesgo de seguridad porque vas volando sobre el camino.
y en resumen ( suponiendo que tienes todo en buen estado), recomienda ponerle 4H y bajar el aire a los neumas.
Why wash board roads are hazardous
Beyond the simple annoyance, driving over wash board roads is dangerous and tough on the vehicle.
Many people find that driving relatively fast over the rough road helps. It does. You minimize the up and down motion of the car, but at a great risk. Understand that at higher speeds your tires are in less contact with the road as they bounce from ridge to ridge. That means only a small fraction of the tire is making contact with the road. Turning and stopping distances are reduced dramatically on an already loose surface. It’s similar to driving over a slippery surface. Add in high speeds, and you’re asking for trouble.
Your suspension, meanwhile, is taking a beating. The rapid up and down motion puts tremendous stress on the suspension and causes shocks to heat up and fail. The car may feel level to you because your suspension is taking all the abuse.
All that vibration and pounding cause bolts to loosen and parts to crack. Worn tie rod ends, worn out bushings and CV joints are possible, among other problems.