All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
Our answer to your questions will be summarized in the following points:
1) It is not permissible for a resident to shorten the prayer before starting his journey and departing from the town [or country] where he resides. An-Nawawi conveyed the consensus among the scholars about this issue.” The intention of travelling is not enough for shortening the prayer before actually starting the journey and departing from one's hometown. Allaah Says (what means): {And when you travel throughout the land, there is no blame upon you for shortening the prayer.}[Quran 4:101]. A person cannot be called traveling throughout the land until he has actually started his journey and set forth. Then, when he starts his journey, it is permissible for him to combine and shorten the prayers from the beginning of the time to the end and it is not limited to the beginning of its time, as the questioner mentioned.
2) If the time of the prayer has started before one starts his journey and he started his travel before performing it, the scholars differed in opinion about whether or not one may shorten the prayer. The predominant opinion is that one is permitted to shorten the prayer; this is the view of the Hanafi, Shaafi'i and Maaliki Schools; with some differences about some details.
3) According to the view of the majority of the scholars it is not permissible to combine two prayers when one is a resident except under certain conditions, like fear and when it is raining, or when one is sick. Therefore, whoever intends to travel after the time of the Thuhr prayer started, he is not permitted to combine the Thuhr and the ‘Asr prayers at the time of the Thuhr before setting forth. If he wants to perform the Thuhr prayer before travelling, he is obliged to complete it without shortening it, and then when the time of ‘Asr starts during his trip, he should shorten it. With regard to your statement "there is no mosque", then the entire earth is a mosque and a praying person, whether a man or a woman, may perform his/her prayer anywhere possible.
4) The distance of travel is estimated at 83 km one way (i.e. without calculating the return distance). Hence, whoever travels a distance of 60 km is not permitted to shorten and combine the prayers according to the view of the scholars who conditioned the distance of travel to be 83 km (one way).
For more benefit, please refer to Fatwa 83821.