Show Q 0 o ROAD BUILDERS STUDY SOILS Highway Engineers Engineer Expected to Obtain Obtain Ob Ob- tain taro Important Information by Investigation An investigation which promises to place at the disposal of ot highway engineers engineers engineers en en- Important Information regard regard- regardIng regarding ing lag the rela relation lon of ot soils to highway durability has been undertaken by the bureau of public roads United States department of agriculture This work Includes taking samples of ot soil at spots In the of ot a highway where the road has begun to fall fail studying surrounding geological condItions conditions conditions con con- to determine how moisture arrived arrived arrived ar ar- rived In the s thus destroying destroy destroy- ing its its' value making laboratory tests to determine the physical characteristics char chap of ot soils solis and obtaining a scientific scientific- measure measure of ot the bearing value of ot soils In this Investigation it Is proposed proposed pro pro- proposed posed to obtain as much operation co-operation as possible from the various state highway departments The bureau of ot soils Is c operating co-operating with the bureau J of public roads In this work Preliminary Investigation has bas been started in Maryland on the Washing Washing- Washington ton ton Baltimore road and will be extended extended extended ex ex- ex- ex tended beyond Baltimore and on other roads In Maryland Progress has been made In the matter of laboratory tests a number of ot samples of ot material and other samples already having been examined The federal highway engineers point out that soils differ widely in their ability to support loads particularly when they are wet Just why this Is true and just what are the characterIstics characteristics characteristics character character- which make them different Is little understood at present It Is In t 4 ti tir jr- jr r q 4 I Improved Highway Near Washington Washing Washing- ton D D. D C C. C this field of Investigation In of ot Increasing Importance because of the growing volume volume vol vol- ume of heavy traffic that the federal Investigators expect to secure Important Important important tant Information |