The invention relates to the technical field of 
road traffic safety, in particular to a design method of a highway exit 
downgrade ramp inducing 
system. The highway exit 
downgrade ramp inducing systemcomprises multiple 
low frequency single-layer linear inducing marks, multiple 
low frequency multi-layer linear inducing marks, a 
medium frequency yellow light-reflective aluminum plate, continuous 
high frequency cat eye road studs, multiple anti-collision buckets and a light-reflective vibration mark line, wherein the multiple 
low frequency single-layer linear inducing marks are arranged behind anexit ramp 
nose guardrail; the multiple low frequency multi-layer linear inducing marks are arranged behind the exit ramp 
nose guardrail; the 
medium frequency yellow light-reflective aluminum plate isarranged on an exit ramp left side guardrail; the continuous 
high frequency cat eye road studs are arranged on a beginning lane edge line of an exit ramp deceleration lane; the multiple anti-collision buckets are arranged in the position, close to the internal side of a guardrail, of the 
nose end of the exit ramp; the light-reflective vibration mark line is arranged on the edge line of an exit ramp lane; the single-layer linear inducing marks, the multi-layer linear inducing marks, the yellow light-reflective aluminum plate and the cat eye road studs are correspondingly arranged to form multi-frequency active inducing vision information; the arranging ending positions of the single-layer linear inducing marks, the multi-layer linear inducing marks, the yellow light-reflective aluminum plate and the cat eye road studs are the ending cross section of a ramp curve; and the anti-collision buckets, the light-reflective vibration mark line and the guardrail are correspondingly arranged to form a passive protection facility.