Abstract
Transportation Technology Center, Inc. has been evaluating and reporting on the evolution of premium railway crossties and fastening systems designed for heavy axle loads since the beginning of the Heavy Axle Load Program in 1988. During that time, suppliers have developed components that help extend the life of the ties and provide increased overall track strength and gage retention. The preliminary data reported here is for the newest crosstie and fastening system tests at FAST (Facility for Accelerated Service Testing).