Sida lagu sheegay tirokoobku, ku dhawaad ​​80% waddooyinka waaweyn ee laamiyada ah ee la dhamaystiray ee loo furay isu socodka gaadiidka dalkeena waxa ay yihiin laamiyo laami ah. Si kastaba ha noqotee, marka la horumariyo waqtiga, saameynta cimilada kala duwan iyo xaaladaha deegaanka, iyo ficilka culeyska culeyska sare ee wadista, laamiyada asphalt ayaa sii xumaan doona. Heerarka kala duwan ee burburka ama burburka ayaa dhaca, dayactirka laamigu waa in la qaato habab farsamo oo wax ku ool ah si loo yareeyo xaalufkan si laamigu u bixiyo tayo adeeg oo wanaagsan inta lagu jiro nolosha adeegga.

Waxaa la fahamsan yahay in qaar ka mid ah shirkadaha Maraykanka ay ku soo gabagabeeyeen raadinta cilmi-baaris ku saabsan boqollaal kun oo kiiloomitir oo waddooyin waaweyn ah oo darajooyin kala duwan ah iyo tiro badan oo ah dayactirka iyo tirakoobka waxqabadka dayactirka: mid kasta oo Yuan ah oo lagu maalgeliyo maalgelinta dayactirka ka hortagga, 3-10 Yuan waxa lagu kaydin karaa lacagaha dayactirka ee dambe. gunaanad. Natiijooyinka qorshaha cilmi-baarista istiraatijiyadeed ee waddooyinka waaweyn ee Maraykanka ayaa sidoo kale lagu daray kharashka. Haddii dayactirka ka-hortagga ah la sameeyo 3-4 jeer inta lagu jiro wareegga nolosha ee laamiga oo dhan, 45%-50% kharashyada dayactirka ee xiga waa la badbaadin karaa. Dalkeena waxa aynu mar walba xooga saarnay “Dhismaha iyo dayac-tirka dayac-tirka”, taas oo keentay in tiro badan oo goor hore ah ay waxyeelo soo gaadho dusha sare ee wadadu, iyada oo ay buuxin wayday adeegii loo baahnaa ee nashqaduhu u baahnaayeen. Dhaqdhaqaaqa taraafikada qiimaha isticmaalka waddooyinka, oo keenaya saameyn bulsho oo xun. Haddaba, waaxyaha maamulka waddooyinka ee ay khusayso waa in ay fiiro gaar ah u yeeshaan dayactirka waddooyinka iyo ka hortagga iyo yaraynta cudurrada kala duwan ee ku dhaca hareeraha waddooyinka, si loo hubiyo in dushayada waddooyinku ay helaan adeeg tayo leh.