Most truckers know what a commercial fuel stop looks like. Some commercial truck stops offer one side for regular passenger vehicles and one side for commercial trucks and other larger vehicles, such as RVs.
You’ll find fueling stops that cater only to one or the other - most drivers of large commercial vehicles prefer to avoid passenger vehicles at their fueling stops. The aim of most businesses is to get fueled and get the driver back on the road to deliver or pick up whatever is needed to get the job done.