服務日期起始時間從 10:26 出發於 2026年9月8日預定出發顯示 21公車行程至預定觀察到H4Hertford, Bus Station (Stop 1)10:35—H3Hertford, Bus Station (Stop 1)11:15—H4Hertford, Bus Station (Stop 1)11:35—341Broxbourne rail station (A)11:42—H3Hertford, Bus Station (Stop 1)12:15—H4Hertford, Bus Station (Stop 1)12:35—308Bus Station13:12—H3Hertford, Bus Station (Stop 1)13:15—H4Hertford, Bus Station (Stop 1)13:35—341Broxbourne rail station (A)13:43—H3Hertford, Bus Station (Stop 1)14:15—H4Hertford, Bus Station (Stop 1)14:35—H3Hertford, Bus Station (Stop 1)15:15—H4Hertford, Bus Station (Stop 1)15:35—341Broxbourne rail station (A)16:02—341Broxbourne rail station (A)16:09—H3Hertford, Bus Station (Stop 1)16:20—H4Hertford North Railway Station17:25—341Broxbourne rail station (A)18:13—H4Hertford North Railway Station18:25—341Hertford, bus station (1)19:54—預定和觀察到的數值分開保存。當缺少特定站點的即時觀察時，BustimeFinder 不會捏造即時出發。