These signs are mounted at the beginning of each street & alley & show the name of the route. The sign is double sided with dimension of 80 x 30 or 90 x 34cm. The background is blue (blue retroreflectives or blue electrostatic paint to reduce cost) & the wording is white retroreflective material . The sign must be mounted so that its surface is perpendicular to the route & easily visible. If two signs are mounted on one post as perpendicular
to each other, drivers can easily receive information on the crossing route & select their destination accordingly.