Rojnivîska cmodyssey

How to change a juntion to show it's now a tuen left only?

Ji alî cmodyssey ve di 14 November 2010 de bi English hatiye nivîsîn.

Hi,

Can someone let me know how I edit OSM to change it from a T juntion being able to turn left and right, to only being able to turn left.

Thanks,

Richard.