Show ROAD TESTS IN CALIFORNIA Over Adobe Land Concrete Is Laid on Sides With Macadam in Middle Surface Topped An experiment In road construction over ver adobe land is being made in a n Section of the county highway between Ba Bay Point and PIttsburg In Cali Call Calli i fornia I Experience has hns shown that concrete I roads built over adobe land results inthe In Inthe Inthe the cracking and disintegrating of th the road In a t few w seasons and In an effort to overcome this trouble County Surveyor Arnold Is having the link of the county highway constructed in a manner tried In several eastern states And proved successful The concrete Is laid In two sep separate rate sections each eight feet wide with a aI I two loot strip through the center In Inthis Inthis Inthis this strip Is placed oil macadam which which is rolled level to the surface of the concrete and the entire surface Is faced with a n topping |