Greater Anglia operates a train from Hertford to Chelmsford hourly. Tickets cost $12 - $18 and the journey takes 49 min. Greater Anglia also services this route every 15 minutes. Alternatively, Green Line (operated by Arriva) operates a bus from Hertford to Chelmsford every 20 minutes. Tickets cost $5 and the journey takes 25 min. 2 other operators also service this route.
From Hertford East train to London Liverpool Street then train to Chelmsford. 1 h 30 min £22. From Hertford, Bus Station bus to Harlow Town Centre, Bus Station (Harlow Bus Stn) then line 59 bus to Chelmsford City Centre, Railway Station (Chelm Rail Stn). 1 h 38 min £8. From Hertford taxi to Chelmsford. 38 min £124. From Hertford drive to Chelmsford. 38 min £5.