Recent　trends　in　road　engineering　have　explored　the　potential　of　incorporating　recycled　solid　wastes　into　infrastructures　that　including　pavements,　bridges,　tunnels,　and　accessory　structures.　The　utilization　of　solid　wastes　is　expected　to　offer　sustainable　solutions　to　waste　recycling　while　enhancing　the　performance　of　roads.　This　review　provides　an　extensive　analysis　of　the　recycling　of　three　main　types　of　solid　wastes　for　road　engineering　purposes:　industrial　solid　waste,　infrastructure　solid　waste,　and　municipal　life　solid　waste.　Industrial　solid　wastes　suitable　for　road　engineering　generally　include　coal　gangue,　fly　ash,　blast　furnace　slag,　silica　fume,　and　steel　slag,　etc.　Infrastructure　solid　wastes　recycled　in　road　engineering　primarily　consist　of　construction　&　demolition　waste,　reclaimed　asphalt　pavements,　and　recycled　cement　concrete.　Furthermore,　recent　exploration　has　extended　to　the　utilization　of　municipal　life　solid　wastes,　such　as　incinerated　bottom　ash,　glass　waste,　electronics　waste,　plastic　waste,　and　rubber　waste　in　road　engineering　applications.　These　recycled　solid　wastes　are　categorized　into　solid　waste　aggregates,　solid　waste　cements,　and　solid　waste　fillers,　each　playing　distinct　roles　in　road　infrastructure.　Roles　of　solid　waste　acting　aggregates,　cements,　and　fillers　in　road　infrastructures　were　fully　investigated,　including　their　pozzolanic　properties,　integration　effects　to　virgin　materials,　modification　or　enhancement　solutions,　engineering　performances.　Utilization　of　these　materials　not　only　addresses　the　challenge　of　waste　management　but　also　offers　environmental　benefits　aiming　carbon　neutral　and　contributes　to　sustainable　infrastructure　development.　However,　challenges　such　as　variability　in　material　properties,　environmental　impact　mitigation,　secondary　pollution　to　environment　by　leaching,　and　concerns　regarding　long-term　performance　need　to　be　further　addressed.　Despite　these　challenges,　the　recycled　solid　wastes　hold　immense　potential　in　revolutionizing　road　construction　practices　and　fostering　environmental　stewardship.　This　review　delves　into　a　bird＇s-eye　view　of　the　utilization　of　recycled　solid　wastes　in　road　engineering,　highlighting　advances,　benefits,　challenges,　and　future　prospects.　©　2024　The　Authors