In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Carnival are reminded to check the back seat when a sensor determines the back seat is occupied. The Voyager doesn’t offer a back seat reminder.
The Carnival has standard Forward Collision Avoidance, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The Voyager doesn't offer collision warning or crash mitigation brakes.
The Carnival’s lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The Voyager doesn’t offer a lane departure warning system.
The Carnival SX/Prestige has a standard Surround View Monitor to allow the driver to see objects all around the vehicle on a screen. The Voyager only offers a rear monitor and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the front or sides.
The Carnival has a standard blind spot warning system which uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them and moves the vehicle back into its lane. A system to reveal vehicles in the Voyager’s blind spot costs extra.
To help make backing out of a parking space safer, the Carnival has a standard cross-path warning system, which uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. Cross-path warning costs extra on the Voyager.
The Carnival’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Voyager doesn’t offer a driver alert monitor.
Both the Carnival and the Voyager have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.

