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Colette

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Aug 4, 2024, 6:21:51 PM8/4/24
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Asfar as I can tell the OSM wiki page on junction=roundabout ( :junction%3Droundabout ) does not mention channelized roundabouts, a.k.a turbo roundabouts ( _roundabouts ), which are growing like mushrooms in some parts of Europe.

Lanes in such a roundabout are spiraling out. It is normally required for a driver to chose the correct entering lane based on the desired exit. Usually it is not possible to make a full circle, i.e. to exit on the same road as entered - but there may be exception for some of the approaching roads.


You need to distinguish the original Dutch type with physical separation between lanes (so they are often drawn as separate lines), and eg German ones with road markings only. I have seen a few of the former.


I tested the result for this roundabout using the three routers on osm.org. The routing works fine IMO and actually tells exactly on which lane to enter the roundabout, and how you are guided over the junction.

I imagine a navigation app or device could base a proper lane detail view on this information.


It would be very nice to help users get into the correct lane at these roundabouts. We American drivers are still learning how to use roundabouts, even single-lane roundabouts, and could use all the help we can get.


This one appears to have been implemented for purposes other than can be achieved by the design.

The design increases throughput on the major road, by banning manoeuvers on the roundabout; at the same time increasing safety. For motorised traffic, that is. If you mix in level cycle crossings and level pedestrian crossings, you lose much of the advantage.


In my wider vicinity, there are some large multi-lane roundabouts where it is possible and permitted (and sometimes necessary) to change lanes. The lanes start from the central island and lead outwards, although it sometimes happens that an exit of the roundabout does not get its own lane if the exit is not important enough.


Yes, this is not a multi-lane roundabout. I only used it as an example of a physically separate right lane, which can occur in combination with a multi-lane roundabout, such as here in Dublin (still in the U.S.):


In that case I woud not map these lanes as separate ways.

If changing lanes on the roundabout is possible and even necessary, that defeats the very idea of the turbo roundabout: choose before you enter, do not change lanes on the roundabout, and you are led to the right exit without any manoeuvre.


Dutch mappers are rapidly converting roundabouts from two-lane roundabouts with one ring mapped as change:lanes=nono to detailed turbo roundabout mapping with separate lanes on the roundabout.

We resolved some minor issues regarding names, highway level of bypass lanes, explicit give_way nodes or not, and turn restrictions on the roundabout which are implicated by the geometric layout. No major issues; rendering and routing look fine.


Another Dutch rule: jurisdiction is that traffic on the roundabout has to stick to the arrows on the chosen presort lane. This is the basis for some movement restrictions on the roundabout that are not physically impossible. After all, the physical separation has gaps, or nobody could enter the roundabout at all.

Sometimes this rule leads to this absurd situation: two vehicles, moving exactly in the same way exacly the same lane, approaching a choice: exit now or continue to the next exit; then one is allowed to continue, while the other MUST exit, just because it came from a different approach. We did not tag conditional turn restrictions based on the presort lane you came from!


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Android Automotive aka Android Automotive OS or AAOS is a variation of Google's Android operating system, tailored for its use in vehicle dashboards. Introduced in March 2017, the platform was developed by Google and Intel, together with car manufacturers such as Volvo and Audi. The project aims to provide an operating system codebase for vehicle manufacturers to develop their own version of the operating system. Besides infotainment tasks, such as messaging, navigation and music playback, the operating system aims to handle vehicle-specific functions such as controlling the air conditioning.


Android Automotive is an open source operating system and as such, a car manufacturer can use it without the Google Automotive Services (GAS),[better source needed] which are a collection of applications and services (Google Maps, Google Play, Google Assistant, etc.) that OEMs can license and integrate into their in-vehicle infotainment systems. Volvo, Ford and GM are using AAOS with GAS, where Stellantis didn't licence GAS and uses Alexa and TomTom.


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Locations are different areas across the map of varying theme, that present unique and creative spots that help add to the game's driving experience, to hold races, and immerse players in different around-the-world places.


One way players can explore locations is by using the games GPS. This menu can be used by scrolling across the map before clicking on one of the pins. The pins are designated to a specific type of location. The pins the map shows can be changed on the right side of the gps between All, Areas, Jobs, and Races. Another way to teleport to locations is scrolling through the places shown to the right of the pin selection.


The map navigation tools provide information such as a visual representation of a thing's location, set and/or ranged rewards for completion of tasks or winning Races, a way to check the current number of players participating in Races, and a way to instantly teleport to each location.

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