Show ROAD BUILDING the state slate of 0 illinois with the col cooperation of the bureau of public of 0 the federal government has built a piece of road two miles long which includes sixty ferent sections representing as many different methods and kinds of construction st having various thickness es of concrete cement grout and asphalt filled brick as well as asphalt lc concretes and concrete with rolled rolled stone bases the construction of this piece of road was completed in april 1921 since which time a corps of engineers has been engaged in making observations tor for effect of temperature chah changes static and repeated loads and sub grado conditions and now a fleet ot of ten tell motor trucks received by the me state from the surplus of the war department are to be oper operated aled over the road in testing it out at first they will be lightly loaded but as the test progresses the load will be increased until a maximum is reached giving a pound rear wheel load the agricultural department at al washington in a statement covering the experiments says mat the results will show definitely the types ot of pavement pave mena which can be expected to support heavy traffic frame as well as those which will not satisfy the requirements of such traffic gramc conditions as might be expected during the next ten tell or twenty years |