During the Second World War unpredictable changes in soil conditions caused by sudden rainfall limited the movement of tanks and oft en destroyed the prepared battlefields No. It Can cross some road sections The U.S. Army Water Street Technology test station uses a purely empirical method, to investigate overtaking problems and use the "Taper Index Method" to with the In other words, the soil index "tape index" is measured using a tape-penetration measuring device and then compared to the vehicle "tape index" obtained by the test.