Speed Breaker Boards Of Size 900 Triangle , 600 Mm X 200 Mm Using High Intensity Prismatic Type Iv Sheeting On 2.00 Mm Corrosion Resistant Aluminium Sheet Cut Out Figures Confirming To Rdso Provisional Specification For Retro Reflective Indicators May2011 And The Configuration Of Board Should Confirm To Rdso S Provisinol Spec 2001 With 25 Mm X 25 Mm X3 Mm Ms Angle Back Frame.