# How to use Emergency Only roads?

**URL:** <https://ask.openrouteservice.org/t/how-to-use-emergency-only-roads/4123>\
**Category:** directions\
**Created:** [August 19, 2022, 3:07am UTC](https://ask.openrouteservice.org/t/how-to-use-emergency-only-roads/4123 "2022-08-19T03:07:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![topographix](https://ask.openrouteservice.org/user_avatar/ask.openrouteservice.org/topographix/32/1270_2.png) [@topographix](https://ask.openrouteservice.org/u/topographix)\
**Post date:** [August 19, 2022, 3:07am UTC](https://ask.openrouteservice.org/t/how-to-use-emergency-only-roads/4123/1 "2022-08-19T03:07:11Z")

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Is there a way on a self-hosted installation to override a value of **Allowed Access All=None**?

The scenario: dual carriageway road has emergency access links at regular intervals along the dual carriageway. In scenario #1, for everyday _car_ profile directions, the links are not used, which is the correct behaviour.

Now I wish to create an alternative scenario #2 where one side of the road is blocked. The obstacle might be a flooded road, a bushfire, a broken bridge, or most likely a road accident blocking all lanes.

When I place an obstacle on the road after the intersection with the emergency use only road, I need the directions to use the link and find a route that does a U-turn on the link and goes in the opposite carriageway.

 ![allowed_access_no](https://ask.openrouteservice.org/uploads/default/original/2X/7/70b44cca2c8fc93efc3f43e85f3fc1847d6924df.jpeg)

Is there a way I can use a new profile called say _car-emergency_ that will use the link to turn around?

This is the tag I need: [Tag:service=emergency\_access - OpenStreetMap Wiki](https://wiki.openstreetmap.org/wiki/Tag:service%3Demergency_access)

_service=emergency\_access_

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**Author:** ![amandus](https://ask.openrouteservice.org/user_avatar/ask.openrouteservice.org/amandus/32/669_2.png) [@amandus](https://ask.openrouteservice.org/u/amandus)\
**Post date:** [August 19, 2022, 10:17am UTC](https://ask.openrouteservice.org/t/how-to-use-emergency-only-roads/4123/2 "2022-08-19T10:17:31Z")

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Hi @topographix,

for this topic please take a look through:

> [@Average Speed for Isochrones. Emergency vehicles](https://ask.openrouteservice.org/t/average-speed-for-isochrones-emergency-vehicles/1521):
>
> Hi all, I have an API-KEY and want to calculate accessibility isochrones for emergency vehicles. Some time ago this was relatively easy, because the average speed was still configurable. I have a large data set to calculate a valid average speed of emergency vehicles. At [disaster.openrouteservice.org](http://disaster.openrouteservice.org) the option is still available. However, it is limited to Africa, South America and Indonesia. Currently I am using the API in QGIS. I would also have the possibility to access it via R or other t…

> [@Create a new FlagEncoder](https://ask.openrouteservice.org/t/create-a-new-flagencoder/2299):
>
> I’am trying to add a new FlagEncoder to ORS, i’am wondering if there’s a documentation somewhere that can help. Regards.

> <https://github.com/GIScience/openrouteservice/issues/1193>
>
> Hi and thanks for the awesome service.
> 
> Having an option to disable access res…trictions during a reach analysis would be beneficial. For example for firefighters it might not be too important if something is a private road so having a drop down menu (like for avoid) with different options for access=customer/private/no would be nice.
> 
> In this example one could take the private shortcut in an emergency. Which would extend the reach towards the west quite significantly.
> https://bit.ly/3mXOjea

Best regards