Question: Some truck drivers travel all year long due to the nature of their work. Is it permissible for them not to observe Sawm (Fast) during the month of Ramadaan? When are they required to make up for these missed days of Sawm? Or are they not permitted to break their Sawm during Ramadaan?
Answer: If the distance they travel is equal to the distance over which it is permissible to shorten Salaah (Prayers), then they are permitted to break their Sawm during their journeys. They must make up for the days of Sawm that they miss before the start of the following month of Ramadaan… read more here.