Product Name: Two-way signs indicating signs straight Product Model: HS-BP-03 form two-way traffic on the road, using natural or artificial isolation measures to completely separate the uplink and downlink traffic, for some reason (construction, bridges, tunnels) the formation of a non-isolated two lane shall be provided with this flag. Generally located on the outskirts of the road marked with the front of the crosswalk. Crosswalk lines on city roads because more can be set according to actual needs. This flag is set up in primary schools, kindergartens, Children's Palace, a children's playground and other children frequented places or at the channel. This flag is set in livestock activities often have sections particularly bad sections of sight before the appropriate location.