Yes, and they should be: the culvert, the approach (TxDOT geometry where it meets a highway), the concrete at the gate line, the gate posts, and the automation conduit are one entrance, and building them as one scope means one mobilization and a gate that never sags into a drive that never washes.
More detail
A rural entrance is a small system, and building it piecemeal is how properties end up with a gate that drags a rutted approach. Designed together, the pieces reinforce each other. The approach: where the drive meets a state highway (US 82, US 377, US 69, SH 289), TxDOT's access permit and geometry govern (width, radii, surface, drainage); on county roads, the county road department and its culvert standards take over. The culvert: sized for the bar ditch's actual flow, set at the right grade, with concrete or riprap ends that survive mowers and storms. The setback: the gate sets back from the road far enough that the longest vehicle that visits (a gooseneck with a truck, a hay trailer, a delivery box truck) can stand fully off the pavement while the gate opens, commonly 30 to 100 feet on working properties, and the space between road and gate is the natural place for the thickened concrete pad that carries turning loads. The structure: gate posts sized and concreted for the gate's weight and wind, because sag is a post disease; a cattle guard where the operation wants unbroken traffic. The wiring future: conduit sleeved under the drive and power roughed toward the operator pad while the trench is open, with a licensed electrician landing any power, so automation later is a bolt-on rather than a bore. One scope, one mobilization, one written price, and an entrance that works as a unit for decades.