200*220mm Directional Address Signs , Indoor Wayfinding Signage

Aurora Sign Event Directional Signage,Directional Address Signs

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Ground Mounted versus Overhead Sign Structures Ground Mounted Signs ‐ Ground mounts are used for the majority of signs in Alberta. They are reasonably economic and consistent in appearance and placement. Guide signs are normally installed on the right side of the road, as this is where the driver expects to see them. However, under certain circumstances, signs can be mounted at other locations when it is beneficial to do so. These locations can include:

• In the median to increase conspicuity.
• On the left hand side of the road if there is a sharp right turn. Overhead Signs ‐ Overhead signs are used on freeways, expressways and major arterials where there are many lanes of traffic, sightline issues, or where the sign needs to be seen from a far distance. They are not normally installed on two‐lane highways. Overhead signs may be installed on a bridge type structure or cantilever. There are many situations where overhead sign structures may be beneficial:
• Traffic volumes at or near capacity.
• Complex interchange design.

• Collision experience indicates drivers having difficulty seeing the primary sign.
• Three or more lanes in each direction.
• Restricted sight distance.
• Closely spaced interchanges.
• Multi‐lane exits.
• Left hand exit.
• High percentage of trucks.
• Background street lighting.
• High speed of traffic.
• Consistency of sign message location through a series of interchanges.
• Insufficient space for ground‐mounted signs.
• Junction of a major route with another freeway.

The existence ofone or more of these conditions does not automatically justify the use of overhead signs. Some of the noted elements may be made less critical by close coordination between design and operation. Overhead sign supports, should not be installed in gore areas or other exposed locations.

Longitudinal Placement

The distance of a guide sign from an intersection is dependent upon the reading reaction and maneuver time and the resultant decision sight distance. Details of the distances of signs at intersections and interchanges are provided in the TCS Drawings in Sections A4.4 and A4.5. When all the information required by the driver cannot be placed on a single sign or on a number of signs at one location, a longitudinal separation of 100 to 150 m between sets of basic signs is required for all rural areas and 50 to 100 m for urban arterials and freeways. If the guide signs contain more than basic information then the distance between them becomes a function of the amount of information that the driver must read andabsorb, and must be increased.

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