Bridges in New Zealand

I cannot leave this lovely country, without mentioning the bridges in New Zealand.    Now there are two way bridges of course, but without doubt most of the bridges on the very scenic roads are one way only, with signs informing the drivers about right of way.       And very occasionally, as can be seen in the photograph below, there are lights.

 And on some of the bridges, there is also a train to consider.   Although I might add, there are not many trains, thank goodness.    The bridge below was also being repaired, so in this case it was like driving through a tunnel.

Some of the bridges, have very high sides, as does the bridge below, which spans the river in the Haast Pass.   I am not sure whether the sides prevent drivers from plunging into the depths below, or they are there to strengthen the bridge.    No doubt it is for the latter reason, as these bridges span very dangerous rivers, which are likely to carry the bridge away, when in flood.    

This bridge has slightly higher sides, is very long and has passing bays.    Not that I would like to pass a truck on the bridge.

Thank goodness there are always arrows on the road, after leaving the bridge, to let people know which side of the road they are meant to be travelling on.   A bit of a problem with the tourists, I hear.