高速公路养护管理是一项业务面广、技术性强的工作。
Maintenance and management on expressway is wide range and dependent on technology.
目前，公路修建与养护的资金一般来源于州燃油税(例如汽油)(每加仑20美分)，联邦燃油税和机车管理费。
At the moment highways are funded by a motor-fuels (ie, petrol) tax of 20 cents a gallon; a federal motor-fuels tax; and vehicle registration fees.
但是4月份联邦公路管理局否决了这一提议，凭据是一项联邦法令，后者规定州际公路产生的通行费只能用于所征收公路的修缮或养护。
But the federal Highway Administration rejected this proposal in April, citing a federal rule that toll revenue generated on interstates may be used only to improve or maintain the road with the toll.
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