Dynamic characteristics of track at L.U.L. Heathrow terminal 4. (February 1988) (IM-VDY-014)

The track foundation on the London Underground Heathrow loop changes between the Terminal 4 and Terminal 1,2 & 3 stations. It has been observed that the resiliently mounted track appeared to be more distinctly corrugated compared to the solid foundation track. Several features of the site are relatively constant including...