Toll　stations　are　bottlenecks　in　the　traffic　flow　of　expressways,　and　the　evaluation　of　their　capacity　is　essential　for　the　operation　of　the　expressway.　Traditional　capacity　studies　are　mostly　based　on　theoretical　modelling　of　traffic　engineering　or　simulation,　with　a　focus　on　parameter　tuning　and　idealized　hypotheses,　resulting　in　poor　reliability.　In　view　of　the　coexistence　of　electronic　toll　collection　lanes　and　compound　toll　collection　lanes　at　toll　stations　of　expressways　in　China,　the　present　study　analyses　the　capacity　of　entrance　and　exit　lanes　of　toll　stations　under　mixed　traffic　conditions　using　a　real　toll　data-driven　approach.　Firstly,　the　service　time　of　a　single　vehicle　during　the　saturation　period　was　taken　as　the　starting　point　for　the　capacity　estimates.　Secondly,　the　variation　in　service　time　for　multiple　categories　of　vehicles　is　modelled　using　lognormal　distribution.　Finally,　the　capacity　of　the　two　types　of　toll　lanes　at　the　designated　toll　station　is　determined.　The　important　outcome　of　this　study　is　the　calculation　of　authentic　capacity　at　the　toll　stations　and　the　discussion　of　individual　special　toll　lanes.　Accordingly,　it　contributes　to　the　development　of　appropriate　policies　to　manage　the　operation　of　the　toll　plaza　effectively.　©　2022　Haolin　Wang　et　al.