Show HIGHWAYS ON PACIFIC COAST interesting figures secured by call forkla experts on pull required to move wagon an energetic and influential organ on the pacific boist the california state automobile association has carried on some investigations affording definite figures of the value of good roads it secured the help of prof F B davedson Dav ldson of the university of california and austin B fietcher state highway engineer in carrying on a large number of tests of the pull re quiren to move a standard farm wagon loaded to mahe the gross weight 6 sounds this wagon was hauled in some cases by a two ton truck and in other cases by a team of good draft horses weighing about 1600 pounds each tests have shown that a pull of 27 to 30 pounds per ton of gross load was needed to haul the wagon on ansur faced concrete roads when the con crete was surfaced with oil and screen ings the pull was increased to about 50 pounds about ca pounds were needed for hauling on water bound macadam and on bituminous concrete laid on top of cement concrete on good gravel roads a pull of 65 to 82 pounds was needed while on loose gravel the pull was ak pounds the highest record in any of the tests about 80 pounds were required for on ous macadam on earth roads 92 pounds w ere required for hauling over a good surface covered with 1 inches of loose dust 99 pounds over an erdl road through california forest nary dirt road with dust 3 inches deep in places and pounds over a muddy earth road the significance of these figures lies id the fact that on a good earth road it Is necessary to exert three times the pull that Is required on a concrete road and nearly twice the pull required on a macadam road furthermore ther more when the earth road becomes muddy a condition which does not affect traffic on good pavements the pull Is more than doubled ROADS INDEX OF CHARACTER determine importance of country limiting or aiding its advance should be built tho roads are an index of the character of any country determining its importance and limiting or aiding its advance A country that w orth a good road worth whit its land sells for and soon wont be worth living in no community that has avci improved its raids ins ever regretted it for road improvement Is a good investment for any community since ahe roads anre for nil the people they should be built by all the people with state and federal aid MOTOR TRAFFIC IS GREATER significant feature of road development Is construction of better surfaces A most feature of road dt v as the construction of better surfaces as a result of automobile anflic for it Is estimated tint there are approximately autos in lisp on the roads of the country or one cr for every mile of road tho mo tor trade Is gi cater than traffic of all kinds 12 vars ago urges permanent reads that road building along permanent lines should be prosecuted as a pirt of our national war program was the determination of the chamber of commerce of the united states at its meeting held at city N J roads expand in winter concrete roada in winter and contract most in summer according to the united states burcia of standards because of increases or decreases in the moisture they contain 0 |