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Show a., '" i i : " - a DURABILITY OF ROADS VARY taMlfleatlon of PatMfiBtr and Freight I Highway la Pradlettd by I Chairman Dlflhl. I I TraJgtit road and passenger roads I am probabilities of the comparative- I ty near future In congested sections I f tho country, according to Chairman j George. C. Dlehl of the A. A. A. good I roads board, who has sent n commuul- I cation to this effect to the office of I the chief of engineers of the War ile- I partment. Mr. Dlehl thus comment on the U-to-dato hlghwuys problem: I "There will never be a time when all roads ure of equal durability and I carrying capacity Highways and I railroads nre analogous, In that they I are both designed to carry trntllc, and I general rules which have been devel- I oped through sclentltlc management I of railroads apply as well almost in- I varlnbly to highways. The heaviest j locomotives nnd rolling Htock aro car- I rled on roads like the New York Ccn- tral and Pennsylvania nnd Union Pn- . clfle. Their use over lighter con- j strutted railroads would ruin the I roads In a comparnthely brief period. I "There must come a classification I of highways. Over class t the heav- I lesl motortrucks nnd trailers would I be permitted ; each' truck should have I large figures conspicuously placed on the sides to Indicate the total walght that It wus permitted to carry; operators oper-ators and owners 'of trucks should be pViwculed for using the henvltst trucks on roads designed for lighter I tralllc. It would be comparatively I simple to enforce such provisions, as there seems to he no defense of tho proposition pel milling one or two heny trucks to ruin nn Investment of ninny thousand dollars on the lighter constructed highways. "At the road Intersection the high-, way capacity could bo Indicated. at the highway department should, I believe, be-lieve, have n trnfllr department under1 a chief tralllc engineer, having to do, not with construction nnd mulnte-nnme mulnte-nnme hut merely with the control of trnlllc. It Ir extremely likely that It would result ultimately In a system of freight roads and pnssenger roads, and that wider nnd parallel roads would result ultimately In a system of freight roads and passenger roads, and thnt wider and parallel roads n . .si 'jus-j -w , . j Brick or Concrete Roads Are Econom- leal if There Is Considerable Heavy Traffic. would be found to be the most economical eco-nomical method of laying out the highway high-way system. "It Is Impossible to lny out all roads of the heavy form of construction; In the first place, the money Is not available, avail-able, nnd, secondly, too muny years would elapse before the more spurse-ly spurse-ly settled sections of the country were developed. It would not he nt Hit dllllcult to break bulk when leaving the heavy tralllc roads, and In i com-1 pnrntlvely brief time nn excellent the ory of highway construction would be developed whereby each locality would be nhtc to determine tho amount it was feasible for them to expend on each mile of highway construction." |