Automatic signalling was commissioned on Wednesday, 25th May, 1927, at 8 a.m. Note the Down Branch Home upper quadrant semaphore. Note also the use of diamond crossings at the General Motors and Ava switchlock sidings as well as at the junction.

6A Down Main Junction Home and 6B Down Branch Junction Home converted to colour light signals (searchlights).

Ava converted to a single ended siding. General Motors Siding removed. All three lens signals converted to searchlights.

A new signal box was commissioned at Petone on 6 April 1952 at 10 p.m. - see Train Advice 638 and the text of S & I 665. Hutt Valley Junction was resignalled - colour light signals with new numbers. The Normal position of the junction points was changed - they are now set for the Branch. The Junction can no longer be switched out - there are no A-lights in new installation. Petone is a Permanent Signal Box.

Defined in S & I 665 dated 21 March 1952.

Melling Branch Singled. Ava siding removed. Train stops installed. Signal 78 Down Home From Melling converted to a double unit signal indicating Medium Speed to the Down Main. For the purposes of the Rules and Regulations Melling, Lower Hutt and Petone comprise one interlocked station under the control of the signalman Petone. Petone is a permanent signal box.

Fletcher Siding Installed. S & I metricated; Up direction now left to right on S & I diagram. Signals 77 Down Home From Main and 17 Up Directing fitted with A-Lights.

Fletcher Siding removed. Stop & Stay signal Signal 1237, which protected the siding, was converted to an automatic stop & proceed signal. I do not have a copy of the current S & I diagram.

A block of line was in place while the connection in the down main was removed. This required a Masterton - Wellington passenger train to run wrong line.