21. When travelling, if ye should stop and rest in some safe spot, perform ye--men and women alike--a single prostration in place of each unsaid Obligatory Prayer # 14Exemption from obligatory prayer is granted to those who find themselves in such a condition of insecurity that the saying of the Obligatory Prayers is not possible. The exemption applies whether one is travelling or at home, and it provides a means whereby Obligatory Prayers which have remained unsaid on account of these insecure circumstances may be compensated for.
Baha'u'llah has made it clear that obligatory prayer "is not suspended during travel" so long as one can find a "safe spot" in which to perform it (Q and A 58).
Numbers 21, 58, 59, 60, and 61 in Questions and Answers amplify this provision.