Changes

From Wazeopedia

Junction Style Guide/Interchange

865 bytes removed, 2 years ago
m
synced to wiki
<!--if the section parameter is defined, do not place the visible banner, only as the code block for the top of a section-->{{GlobalMark/visible}}
<!--
#####-----#####-----#####-----#####-----#####-----#####-----#####-----#####-----
#### This page has been curated ####
#### to be included in the new ####
#### Wazeopedia - GLOBAL Wiki. ####
#### Please do not make any ####
#### edits on this page without ####
#### PRIOR CONSENSUS in the Wiki ####
#### Updates and Discussions ####
#### forum thread for this page. ####
#### If a specific forum thread ####
#### for this page doesn't exist ####
#### please start one. ####
#### www.waze.com/forum/ ####
#### viewforum.php?f=276 ####
#####-----#####-----#####-----#####-----#####-----#####-----#####-----#####-->
 
{{construction
| contact = http://www.waze.com/forum/viewtopic.php?f=276&t=169164&p=1273875#p1273875
| contacttype = forum
| draft = yes
| open = no
| revision = yes
| section = yes
| talk = yes
}}
 
{{ReturnTo | Junction_Style_Guide | the Junction Style Guide}}
Specific examples of how to handle common junction types are provided in later sections. All of those examples use the basic building blocks provided here.
If you are unsure what road type you should use, refer to the '''[[Road types and names/USA|USA Road types]]''' for your countryarticle.
=== Exits ===
[[Road names/USA#Exit_ramps_and_Entrance_ramps_.28on-ramps.29|US Specific Ramp Names]]
 
[[United Kingdom/Roads#Ramps_.28to.2Ffrom_Motorways_and_Dual_Carriageways.29|UK Specific Ramp Names]]
[[Road types and names|Naming standards for other areas]]
=== Wayfinders ===
{{Construction|draft=no|revision=yes|section=yes|contacttype=forum|contact=http://www.waze.com/forum/viewtopic.php?f=276&t=86666}}
 
A '''wayfinder''' gives a user an instruction directing them how to continue on the road the user is already on, in situations where it may be unclear, and there would otherwise be no instruction.
== Interchange configurations ==
Please see the [[Limited_Access_Interchange_Style_Guide|Limited Access Interchange Style Guide]].
=== Diamond interchange ===
: [[Image:Jct_diamond.png]]
''See also: [http[Wikipedia://en.wikipedia.org/wiki/Diamond_interchange |Diamond Interchange article on Wikipedia]]''
Common in wide open spaces where land acquisition and geography are not concerns, this Interchange design has ramps equally distributed across all 4 quadrants.
In the simplest form, this can be represented as single connections from the ramps to the surface street.
Note: Be sure to restrict the The straight through motion from the exit ramp onto to the entrance ramp on should typically be enabled, if legal to drive. Under normal circumstances, the other side of the road. This will prevent Big Detour Prevention mechanism discourages the routing server from trying to route routing someone off the freeway just to get and directly back on it. Even though it When the freeway path between the ramps is closed, or slow enough to overcome the Detour penalty, this off-on route may be given as a legal direction for desirable alternative. Be aware that the Big Detour Prevention penalty is intended to discourage routing that leaves a vehiclefreeway (or highway) and returns to the same freeway (or highway). Therefore, turn restrictions are only for controlling routing directionsat least one name (primary or alternate) of the freeway/highway segment before the exit ramp must exactly match one name (primary or alternate) of the freeway/highway segment after the entrance ramp to trigger the penalty. For further information see the [[Detour Prevention Mechanisms/USA|Big Detour Prevention Mechanism]] page.
: [[Image:Jct_diamond_simple_turnsJct_diamond_simple_turns_new.png]]
If the ramps connect to the surface street at multiple points, ramp-to-ramp routing should be avoided as well as illegal restrict turns which should use another ramp. Review the section [[Junction Style Guide#How complex should ramps be?|How complex should ramps be?]] in the Junction Style Guide for more details on this topic.
First we see the turns that must be restricted for the exit ramps:
: [[Image:Jct_diamond_cplx_turns_off_LJct_diamond_cplx_turns_off_L_new.png]] [[Image:Jct_diamond_cplx_turns_off_R.png]]
Then we see what must be restricted for the entrance ramps:
: [[Image:Jct_cloverleaf.png]]
''See also: [http[wikipedia://en.wikipedia.org/wiki/Cloverleaf_interchange |Cloverleaf Interchange article on Wikipedia]]''
In a Cloverleaf Interchange, left turns are eliminated from all movements between the Freeway and the surface street. First check the exit ramps.
=== Folded diamond interchange ===
: [[Image:Jct_folded_diamond.png]]
''See also: Discussion of Folded Diamonds and A2/B2 Partial Cloverleafs on the [http[wikipedia://en.wikipedia.org/wiki/Partial_cloverleaf_interchange |Partial Cloverleaf Interchange article on Wikipedia]]''
Geography or property ownership may prevent the ability for an interchange to be constructed with all ramps evenly distributed across the 4 quadrants of the interchange. When only two quadrants are used, it is typically called a Folded Diamond (basically a sub-type of a Partial Cloverleaf Interchange). The ramps may be all on one side (as in the examples in this section) or they may be located in diagonally opposed quadrants.
=== Single-point urban interchange (SPUI) ===
: [[Image:Jct_SPUI.png]]
''See also: [http[wikipedia://en.wikipedia.org/wiki/Single-point_urban_interchange |Single Point Urban Interchange article on Wikipedia]]''
A SPUI is a very space and flow efficient design, but it takes extra attention to ensure the turns are correct. And as the name indicates, ideally there should be a single junction in the center. You may need to tweak the geometry of segments a bit off of alignment from the real physical world, but it should be minor if the interchange is a true SPUI.
The outer branches of the exit ramps are very much like in the case of similar to a diamond interchangeand ramp to ramp routing should be enabled if possible and legal. However, in many SPUIs such ramp to ramp routing is not possible:
: [[Image:Jct_SPUI_off_outer_turn.png]]
[[Image:Jct_fc_cloverleaf_bad.png]]
The [[Detour Prevention Mechanisms/USA|detour prevention mechanism]] will prevent discourage Waze from routing users onto the collector-distributor and back onto the freeway – as long as the city name on the freeway is the same (or set to "no city") before, throughout, and after the collector-distributor. Previously this feature was not available and the ramps were set up to restrict the through route. Some of these ramp configurations may still be set up that way, so they can now be configured as pictured above with the through route enabled.
==== Complex collector/distributor interchanges ====
Where collector/distributor lanes are used as part of an interchange, use the {{Ramp}} type for the collector/distributor lanes. Name the ramp segments as you would any other ramp segment.
Ensure that the city a name on the Freeway segments is consistent before and after the collector/distributor lanes, so that the [[Detour Prevention Mechanisms/USA|detour prevention mechanism]] will prevent Waze from routing users erroneously.
{{clear}}
== See also ==
Review the [http[Wikipedia://en.wikipedia.org/wiki/Interchange_(road) |Wikipedia article on Road Interchanges]] for further information on this topic.
{{ReturnTo | Junction_Style_Guide | the Junction Style Guide}}
[[Category:Style Guides]]