Show ri 1 e 10 AA n afaf D SAVING IN TIRES PAYS FOR PAVING automobile owners lit in minni minnesota sota OX hiat year benr through tile the no of tile he SOO tallos of if pavement ent in tho trunk dunk highway system tills this saving in ire fire went wear alone says at bulletin aroln fi the state department Is more nhsin douline tile Int interest frest on oil out invented in trunk highway in tho the interest balue the bulletin points point 4 out such a charge must be for the entire investment vestin elit whether pavement Is paid for liy by a bond issue ns as was done on oil county or when it Is liy by cash us its lias has been do done oil u nil all highway joh nic total investment fi in it pavements Is about land nt at 5 per cent the st cost coat would ho be 1250 hip estimate on sn ing it in tire wr ivear 1 li nihed on oil reports ri orts tit nt lie afie nn an tw of re searh lioard board nt lit ioli It of tests blinde by lip file state col 1111 I 1 in kniff is 4 StI otilit lit agi anil others showell fili owed that on oil it i tallo mile of concrete earr carrying ying cars per ony worth of rubber would ito ho morn iorli out lit in n 1 I year while on oil iowa gravel which 1 li 4 llop 0 A tint les ot 11 gravel 1 ISO 80 worth of Is llsms since arnille on 0 minnesota pavements more luin 2000 car per day nille wears out SOO worth of rubber ench year maile it if tit the vanic curs cam vent over it nule mile of flip cost would he simm in other morda patch nille mile or of car owners lit in X ISOO SOO A year the WWI annual ot cost or of A nille of if paved rood including bitite interest est and Is about 1 1700 00 tile the averige aver ige car owners annual tire hill it if it ho KOPS goes milts a n year and drives on conchete conci ete nil fill tile time should he e according to tho iho tit nt the washington meeting while it if lie he went avent on oil grivel nu nit the time 1114 lu tire hill should he be 1120 fc 0 or in other words ills ids tire cost per nille mile on oil entill concrete ete Is cent and on gravel 10 1 lo is 5 cent using 10 os ns vat OK index for concrete tile investigator reported report the following of wear e ir for other kotlier types or rond surface win lit itlo 05 briedt average mo nitie 14 tint nm best belt lo 10 10 pravel typical town iowa 20 mac nInin het best JH mile adam average 14 44 bivel uncrushed chert 50 poor 00 loose tile tests were wilde tit nt uniform speed 4 because it was found lint speed tiro tire wear temperatures also tipp Pared to tn ln in cregue tire wear it wits atlo found that lint wear on rear tires runs from to per r cent of tile the wear on oil front wheels the bellig belli per cent |