At　night,　clear　pavement　markings　are　essential　for　driver　safety.　Currently,　markings　visibility　evaluation　relies　on　the　retroreflectivity,　but　the　impact　of　line　width　is　unclear.　To　quantify　the　impact　of　line　width　on　visibility　and　to　refine　visibility　evaluation　methods,　a　driver　visual　detection　experiment　was　designed　using　both　qualitative　and　quantitative　approaches.　Twentyfour　drivers　of　small　vehicles　were　randomly　recruited　to　participate　in　visual　detection　tests　of　a　total　of　54　white　pavement　markings　(comprising　6　widths　and　9　retroreflectivity　levels)　under　the　illumination　of　high　beams,　following　the　principle　of　using　the　＂emergence　point＂　as　the　critical　state　for　assessing　pavement　marking　visibility.　This　study　indicated　that　widening　pavement　markings　significantly　enhances　their　visibility,　particularly　for　markings　with　low　retroreflectivity.　A　visibility　evaluation　model　was　established　to　quantify　the　impact　of　width　and　retroreflectivity　on　the　visual　distance　of　markings.　The　model　confirms　that　widening　markings　can　improve　visibility,　thereby　reducing　the　required　level　of　retroreflectivity.　The　research　methodology　and　findings　provide　technical　support　for　managers　to　more　accurately　assess　nighttime　safety　visibility　during　pavement　marking　operation　and　maintenance.