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Aurora has a strong design team with 21 members, we have sufficient experiences in designing road signs and would like to share our experiences at our website. How to design a roadside sign is a big subject, which includes interchange signs.

Interchange Sequence Signs

In city areas when there are multiple interchanges in close proximity, Interchange Sequence Signs are used to show the next two or three interchanges and their locations along a particular route. This gives the driver advance information of how many exits until the desired one and the travel distance to each destination. The distances indicated on the signs shall follow the following guidelines:

• For a distance over 10 km, it shall be given to the nearest whole number
• If the distance is less than 10 km then it shall be given to the nearest 0.5 of a kilometre (i.e. 3.5 km).

• If the distance is less than one kilometre it shall be given to the nearest 100 m (i.e. 500 m).

Typically, Interchange Sequence Signs should be used along the entire length of a freeway or highway section rather than only at isolated interchanges. Interchange Sequence Signs are intended to supplement the overhead or ground mounted directional signs along the highway. They are typically placed upstream of the on‐ramp and downstream of the offramp, approximately midway between interchanges.

Exit Direction Sign on Freeways

The Exit Direction Sign repeats the route and/or destination information provided on the Advance Guide Sign or Interchange Sequence Sign, to give assurance to the driver that the exit is the one being sought. There are typically two directions of travel for a driver exiting at an interchange onto an intersecting roadway, and it is important to clearly and consistently mark which exit is which to avoid confusion and assist the driver in making the correct choice. The Exit Direction Sign typically contains the following pieces of information:

• The route number (or numbers if more than one).
• The cardinal direction (in capitals).
• The names of destinations (with the first letter capital).
• An applicable upward sloping tapered arrow.

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