The design is similar to the elaborate and expensive one installed on the Waikanae River bridge last year but isn’t the same. It seems like it has taken 7½ months, based on this article which announced the start of work in August last year. Well, the Otaki River is wider so this bridge is longer, but even so, 7 months seems quite excessive. It also cost a lot more: $6 million according to an Official Information response!

Unlike the Waikanae one, this Otaki clip-on was paid for by the NZTA. That may be because despite the ‘Ewy’ not far to the east, the NZTA are still treating the bridge as part of SH1?

The existing path was the narrow one opposite so not cyclist-friendly or pedestrian-friendly either.
Unlike in Waikanae, the new cycle lane is on the east side of the bridge. The path visible in the centre here goes under the bridge to a public area which is mostly tarmac but is a starting point of a track down the north bank to the shore.