What describes workers who frequently travel to various job sites for work?

The term that best describes workers who frequently travel to various job sites for work is mobile construction workers. This designation applies specifically to individuals whose roles require them to move between different locations, often in construction-related fields, where they may be engaged in tasks specific to individual job sites.

Mobile construction workers are typically involved in construction, maintenance, or similar activities that necessitate being physically present at work sites rather than at a fixed location. This characteristic distinguishes them from other types of workers, such as temporary workers or remote workers, who may have different working arrangements that do not involve traveling extensively to multiple locations for job-related tasks.

In summary, mobile construction workers represents a specific category of professionals whose work is defined by their mobility and the nature of their job sites, making this the most accurate choice for describing such workers.