Highway vehicle speed early warning method under extreme rainwater weather based on digital twinborn

The invention discloses a highway speed early warning method under extreme rainwater weather based on digital twinning. The method comprises the following steps: S1, road state detection based on a vehicle-mounted three-dimensional laser road surface detection system; s2, real-time measurement and transmission of rainwater parameters based on a microwave detection technology; s3, establishing a digital information model based on multi-source data fusion; s4, establishing data interaction between the digital information model and simulation software; s5, carrying out simulation analysis on an attachment coefficient model based on multi-source data fusion; s6, maximum safe driving speed simulation deduction under different working condition combinations is carried out; and S7, vehicle speed real-time early warning based on digital twinning. According to the invention, a vehicle speed early warning system is established for vehicles running on the highway under extreme rainwater weather based on digital twinning