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| == Understanding navigation instructions ==
| | #REDIRECT [[Roundabouts/USA#Understanding_navigation_instructions]] |
| Normal roundabouts give a ''‘turn right’'' / ''‘continue straight’'' instruction. Non-normal roundabouts give a ''‘take the X exit’'' instruction. This section will explain the difference between a normal and a non-normal roundabout.
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| <br/>
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| A '''normal''' roundabout:
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| *Will give you a ‘turn right', 'turn left’ or ‘continue straight’ instruction.
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| *Has ''up to'' '''4''' nodes.
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| *All exit nodes are aligned within "normal" range of the entrance node.
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| A '''non-normal''' roundabout:
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| *Has '''5''' or more nodes (Ex. Each segment of a [[Best_map_editing_practice#When_.28Not.29_to_Split_a_Two-Way_Road|split]] road connects at its own node.)
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| *Has irregularly placed nodes (this will be covered in the examples.)
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| *Will give you a ‘take the X exit’ (with arrows around it) instruction.
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| ''A roundabout can be both normal and non-normal at the same time depending on your entrance node.''<br/>
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| '''Some examples will help explain:'''<br/>
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| *For the sake of simplicity, let’s look at a roundabout with three exits.
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| *The angle of the segment approaching the node does not matter, it can be similar to any of the segments below, or anywhere in between.<br/>
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| [[Image:Roundabout_2.jpg|360px]][[Image:Roundabout_3.jpg|250px]]
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| <br/>
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| <br/>
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| *Each time you approach a roundabout from one of the three nodes, an imaginary X-Y axis is drawn: ''(1)'' with the origin at the center of the roundabout and ''(2)'' aligned to the entrance node.
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| *'''Coming from node #1, this is how we see the roundabout:'''
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| [[Image:Roundabout_4.jpg|right]] | |
| <br/>
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| :*Both exits 2 and 3 are within the normal range (90°±15° & 180°±15°).
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| <br/>
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| :*''Both exits will get an instruction to ‘turn right’ or ‘continue straight’.''
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| <br clear="all" />
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| *'''Coming from node #3, this is how we see the roundabout:'''
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| [[Image:Roundabout_5.jpg|right]]
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| <br/>
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| :*Both exits 1 and 2 are not within the ‘normal’ range – both will get a ‘take the X exit’.
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| <br/>
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| :*'''''Note:''' even if one of these exits was within normal range, the roundabout itself will be ‘non-normal’ and all exits will get the ‘take the X exit’ prompt. The entire roundabout must be normal.''
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| <br clear="all" />
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