The tunnel interference index

A survey was made of attempts to quantify the interference13; due to tunnel walls,both 2-D amp; 3-D, at compressible speeds.13; An attempt was made to compute this interference for a few13; cases for which corrections are availab1e in the literature13; and also for the NAL data. This will serve as a guide to check if the data from any facility is within the ball park13; numbers for correctable data. Further work, particularly in13; 3-D, is warranted