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The safety feature designed to prevent damage to plant piping when a driver pulls away while hoses are still connected is the use of special valves and fittings. These components are engineered to ensure that if a hose is still connected, the system experiences minimal risk of leaks or breaks.

Special valves and fittings often include features like quick-disconnect couplings that allow for safe disengagement when needed while also ensuring that the piping system remains sealed and protected from undue stress or damage if a disconnect occurs. This is crucial in industrial environments where high-pressure systems may be in play, and unintended disconnection from the piping can lead to significant safety hazards, including leaks or ruptures.

The other options, while they may serve their own important functions in safety and operational efficacy, do not specifically address the issue of protecting plant piping from damage during the scenario described. For instance, a ventilation system manages air quality but does not contribute to the integrity of piping directly. A pressure release valve is primarily focused on regulating pressure within a system, preventing overpressure situations but does not mitigate damage from disconnection scenarios. An automated shut-off system may help in various safety situations but may not provide the immediacy of protection when a driver prematurely pulls away with hoses still attached.