© 1995 - 2018 Government of Alberta
7.5 Size of Signs on Urban and Rural Highways
The sizes of the various signs are as shown on the Urban and Rural Sign Schedules included in Appendix C.
High speed multilane Urban Highways typically handle large volumes of traffic. In these situations, standard sized signs would not normally be effective. Therefore, on multilane urban highways where the original Gazetted Speed is greater than 60 km/hr and the Average Summer Saily Traffic volume (ASDT) exceeds 10,000 vehicles per day, oversize signs are required. On Rural Highways, standard sized signs are normally sufficient.
On Long Duration Projects, the initial sign "Construction Ahead" / "Bridge Construction Ahead/Bridge Construction 3 km" shall be 120 cm x 120 cm.