The　link　slabs　are　structural　elements　connecting　two　bridge　decks,　ensuring　structural　continuity　without　altering　the　simple　support　scheme　of　the　deck.　These　elements　provide　the　durability　benefits　of　integral　bridges　by　eliminating　expansion　joints　between　beams,　which　are　prone　to　water　infiltration　and　exposure　to　degrading　agents.　The　development　of　link　slabs　is　closely　connected　to　the　progress　in　composite　materials.　Ultra-High　Performance　Concrete　(UHPC)　is　a　cementitious　material　capable　of　ensuring　the　mechanical　performance　of　link　slabs　under　operational　loads,　thanks　to　high　resistance　and　durability.　This　work　presents　an　extensive　experimental　characterization　of　prefabricated　link　slabs,　considering　an　experimental　setup　representative　of　operational　conditions.　The　authors　examined　nine　experimental　configurations,　varying　both　the　geometry　and　the　material.　For　geometry,　they　varied　the　bolts’　edge　distance　and　the　thickness　of　the　unbonded　layer.　For　material,　they　studied　link　slabs　made　of　Reinforced　Concrete　(RC),　UHPC　with　randomly　oriented　fibres,　and　UHPC　with　oriented　fibres.　The　effect　of　the　volumetric　fraction　of　fibres　was　assessed　in　the　slabs　with　oriented　fibres.　The　results　provide　practical　recommendations　for　selecting　the　combination　of　geometric　properties　and　materials　to　maximize　the　mechanical　performance　of　prefabricated　UHPC　link　slabs.　©　2024　The　Authors