in travel or on travel

On travel is right.

The basic meaning of travel is "walking, driving", and by extension it can mean "travel, tourism", which refers to multiple trips that someone takes to various places, especially a long trip abroad. travel. Travel generally refers to travel, and is used as an uncountable noun without the indefinite article; if it refers to a longer trip to many places, the plural form travels is commonly used.

Travel can refer to "travel notes, travel notes", usually in the plural form, but not modified with many or numbers.

Travel also means "a group of passengers".

Same root phrase:

publish one's travel publishing travel notes.

read travels Read travel notes.

recite travels Recite travel in detail.

recount travels describes travel.

relinquish travels give up traveling.

set out travel set out to travel.

stimulate tourist travel stimulate tourist travel.