====== Possible special parameters ======

Special parameters are useful for many things ...

<WRAP info>The system_type=0 is ajusted as default (defined if system_type isn't used) and doesn't do anything special, just a normal way.</WRAP>

|**Adapted way type**  |**System_type=**  |**Description**  |
|track \\ monorail_track \\ road \\ maglev_track \\ narrowgauge_track \\ water |1 |elevated way |
|track |7 |tram way (same as waytype=tram_track) |
|::: | 255 |unusable way (fence/pedestrian way/etc …) |
|air |0 |taxiway |
|::: | 1 |runway |
|water |255 |river |