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Show "T T "Fingerprints Fingerprints "fmgerprmts fmgerprmts "Tingerprults " ingerprults " of Roads RoadsShow RoadsShow Show Slippely Sllppeiy SurfacesLondon Surfaces SurfacesLondon LondonA London -A A - A fingerprint fingerprmt method methodrem methodrem methodrem rem n scent of Scotland Yard tech techmque technique techmque mque nique has been devised by hy ministryof rmmstryof rmmstry ministry of transport officials here to track trackdown trackdown trackdown down sl s1 sr ' ppery road surfaces surfacesA A section of the road is li11h.ed li11hed linked li11h.edover linkedover linkedover . over and a smooth tire tyre rolled along alongit It The tire is then transferred to asheet a asheet asheet sheet of white paper where an ex exact exact exact act record of the surface texture te'Cture teCture ' IS ISImprmted isimprinted isimprinted isimprintedA Imprmted imprinted ImprmtedA imprintedA A perfectly smooth road becomes becomesdangerously becomesdangerously becomesdangerously dangerously sl ii ppery when wet be because because cause the water instead mstead of bemg being bemgsqueezed beingsqueezed beingsqueezed squeezed into interstces mterst ces present present\ present presentt presenthen \ t , hen the pavement is of o1 compara comparat t vely rough texture forms a lIq hq.i hqi l . d dfilm dfilm dfilm film between tire tyre and roadIn roadIn road roadIn In the fingerprint fingerprmt tests a sl p pperj ppert pper perj pert } ' road is detected wl wi en the mk ink mktire ) tire tyre makes a full impression on the thepaper thepaper thepaper paper 0 over ' er the entire area of con contact contact contact tact whereas a comparat comparat\ely comparat ely comparatelynon rely relynon \ , ely elynon non skid surface having havmg numer numerous numerous numerous ous ind md mad vicinal vIdual points pomts of contact sep separated separated separated arated by channels through wh ch chwater chwater chwater water can escape shows a speckled speckledprint speckledprint speckledprint print |