As said only NT maps support this feature. NT maps are not possible with mkgmap.

On 17 September 2015 at 10:46, Thomas Morgenstern <webmaster@img2ms.de> wrote:
The speedlimit is shown on my Nüvi only bei garmin-maps like CityNavigator. But I want this feature with my own OSM-Map , generated by mkgmap. I am looking for any hints.  Which option is necessery in the commandline for mkgmap ?
thomas

Am 17.09.2015 um 10:02 schrieb Steve Sgalowski:
I have this already on my nuvi 1450 lmt 

have you updated your firmware in the unit 

Stephen 


On Wed, Sep 16, 2015 at 7:52 PM, Thomas Morgenstern <webmaster@img2ms.de> wrote:
Hi to all, is there a option in the style-file  or in the mkgmap-options, that i can use to generate a tile (12345678.img ), which show me  the speedlimit for  any  road on Nüvi ? If i drive faster then allowed it gets 'red' ? my current version mkgmap is 3622.
thomas
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