In other words, as to the driver who has to work 14 hours in a day, if he starts his driving at 6 o'clock at night, at dayfall he is going to get fatigued much faster in his 14-hour shift than had he started his work at 6 o'clock in the morning and driven during daytime.
Autrement dit, pour le chauffeur qui doit travailler 14 heures dans une journée, s'il commence sa conduite à 6 heures du soir, à la tombée du jour il se fatiguera bien plus vite dans son poste de 14 heures que s'il avait commencé le travail à 6 heures du matin et conduit de jour.