What "LVM map" exactly are you referring to? https://www.lvmgeo.lv/en/maps has many different maps and some are even copyrighted.

In general, please don't use other maps unless you are reasonably certain about them. A random LVM forest road being oneway (when almost none others are) is definitely suspicious and something you should verify with a survey before changing.

Anyway, there were no signs here on the East end https://www.mapillary.com/app/?pKey=785634217065689&focus=photo