Praise be to Allah.
Salaat al-Jumuah (Friday prayer) is not obligatory on the traveller. This is the opinion of the majority of scholars, including the followers of the four schools of Abu Haneefah, Maalik, al-Shaafai and Ahmad Shaykh al-Islam Ibn Taymiyah (may Allaah have mercy on him) said in al-Fataawa (24/178): The correct opinion, without a doubt is that this (Jumuah and Eid prayers) are not obligatory for the traveller. The Messenger of Allaah (peace and blessings of Allaah be upon him) used to travel frequently: he performed Umrah three times, besides the Umrah he performed along with Hajj. He performed his Farewell Pilgrimage accompanied by thousands upon thousands of people, and he went on more than twenty military campaigns, but there are no reports at all that say he prayed Jumuah or Eid prayers when travelling; he just prayed two rakahs [i.e., shortened prayers] as on all the other days. There are also no reports that say he preached a khutbah on a Friday when he was travelling, neither standing on his own two feet or from atop his camel, as he used to do on Eid, or from a minbar, as he used to do on Fridays. He occasionally used to deliver an address to the people when he was travelling, and this was narrated by them but no-one reported that he delivered a khutbah to them before prayer on a Friday whilst travelling, and no-one reported that he recited Quraan aloud on a Friday (i.e., during Salat al-Zuhr, on a journey). Of course, if he had done something out of the ordinary and recited aloud or delivered a khutbah, they would have reported it. On the Day of Arafaah, he delivered a khutbah, then he came down and led them in a two-rakah prayer, but no one reported that he recited aloud in that prayer. That khutbah was not for Jumuah because if it had been for Jumuah, he would have done the same (delivered a khutbah) on every other Friday (when he was travelling); that khutbah was given because it was part of the rituals (of Hajj). Hence all the Muslim scholars said that he would have given a khutbah at Arafaah even if it had not been a Friday. This mutawaatir report proves that it was a khutbah for the Day of Arafaah, not for Friday.
From the above we know that Jumuah is not obligatory for the traveller, all that he has to do is to pray Zuhr. However, if he prays Jumuah with the people of the place he is visiting, this is OK. It says in al-Sharh al-Kabeer (2/154): Whoever of these people travellers, slaves and women attends Jumuah, does not have to pray Zuhr, and we know of no dispute on this point. Their exemption from having to attend Jumuah is to make things easy for them, but if they attend, it is OK, as is the case with the sick person. It is preferable for the traveller to attend Jumuah, because this is better, and is on the safe side (because some scholars think that Jumuah is obligatory for the traveller who is staying in a particular place, but not for the traveller who is on the road), as he comes under the general meaning of the aayah (interpretation of the meaning): O you who believe! When the call is proclaimed for the Salaah on the Day of Friday (Jumuah prayer), come to the remembrance of Allaah, and leave off business (and every other thing), that is better for you, if you did but know! [al-Jumuah 62:9].
We have already stated that the majority of scholars say that generally speaking it is not obligatory. And Allaah knows best.