What is the minimum requirement for functioning wiper speeds during inspection?

During a vehicle inspection, the minimum requirement for functioning wiper speeds is that there must be two operational speeds. This is crucial because having two speeds allows the driver to effectively manage visibility in various weather conditions. For instance, one speed may be suitable for light rain, while a faster speed can be necessary during heavier downpours. Having these options is important for safety, as it ensures that the driver can maintain clear visibility regardless of changing weather conditions.

Inadequate functioning wipers can lead to hazardous driving situations, making this requirement a vital safety standard during inspections. A vehicle that only provides one speed may not adequately address visibility issues during adverse weather, thereby compromising safety. Similarly, while having three speeds or any number of speeds may offer additional convenience or comfort, the regulatory minimum set for inspections is firmly two functional speeds to ensure basic effectiveness and safety in wiper operation.