公路拓宽 meaning in English

highway widening

Application of geogrid in road widening construction
土工格栅在公路拓宽工程中的应用技术
In the process of widening and improving the used road , how to assure the new & old embankment , especially on soft ground , not occurring significantly different settlement and minimizing the deformation and crack of the pavement is a problem to be solved simultaneously
在公路拓宽改造工程中，如何保证新旧路基，特别是软土地基上的新旧路基不发生过大的差异沉降，以减轻或避免路面因此而发生变形、开裂，是迫切需要解决的问题。