The anti-skid road plate surface provides secure access, and hi-vis yellow alerts drivers to reduce their speed. Other benefits of this LowPro plastic road plate include: HS20-44 mpliant; Suitable for 44 tons vehicles over an 18” trench; Suitable for pedestrians over a 36” trench (not a roadway) Quieter, long-lasting, lighter alternative to steel trench plates; Reduces noise pollution and