Track with concrete ties has become a standard all over Europe and this should apply to model railroading too. N Gauge now gets track with concrete ties and rails conforming to NEM Code 60.
Minitrix R3/R4 left curved turnout with a polarized frog and a curve angle of 30.The resulting track layout has a considerably closer spacing. Despite this, the space required is still not all that large even on smaller layouts. An electric mechanism can be installed on this turnout.

Curved turnouts for the R3 and R4 Radius curves.Turnout curve is 30. An electric mechanism can be installed in the turnout.