A portable and solar powered traffic safety system functioning like a decoy police car. A method for producing the bamboo mat board at least comprises steps as follows: cutting step, boiling for blanching step, drying step, rough shaving, bottom layer pre-forming step, adhesive applying and pressing step, pattern selecting step, matting step, and refined shaving, etc. Therefore, the high-purity metallic Ti or the high-purity Ti alloy can economically be produced with high efficiency.