Surely, rather than using short scrubber/grindstones (are they the same or different?) it would be desirable to use stones about one
metre long so as to ensure that only the tops of the corrugations are removed.

You may be interested to note that over a short section of Bermuda Street in the south end of the Gold Coast, the concrete roadway
had substantial corrugations. The wavelength seemed to be over a metre, they were most visible just after rain when the damp still
collected in the dips while the tops dried out. However, they were very noticeable to ear and many drivers stopped thinking that
they had a puncture and a flat tyre. I was caught by this the first time I drove over the road. About four months ago, the traffic
authority (DMR or GCCC) put up notices advising drivers of 'noisy road' as near as I can remember. About a month ago I noticed that
substantial areas of the road had a different colour - much whiter - and I realised that the road surface had been 'planed' and the
corrugations were gone. No more ghost flat tyre effect. I did not see the work being done, and I would be interested to know if
people have noticed this work being done elsewhere - what sort of machine is used? Must be fairly large as I assume that the full
lane width was done at one pass, and start and end lines are at right angles to the direction of the road.

Regards

Dudley Horscroft
----- Original Message -----
From: "Richard Youltressteleg@... [TramsDownUnder]" TramsDownUnder@...>
To: TramsDownUnder@...>
Sent: Thursday, July 20, 2017 11:18 AM
Subject: Re: [TramsDownUnder] Scrubbers

I have to wonder why so many tramways decided that track scrubbing was just a waste of time? The smarter tramways kept theirs.

Perhaps the worst corrugations I ever encountered were on the Newark Subway across the river from New York.

Each corrugation peak was about one foot from the next but were so big that I could feel them through the sole of my shoe. Needless
to say, the PCC ride was very noisy.

We can only wonder what unnecessary wear and tear the trams are subjected to as a result of thundering over such rail.

I also suspect that some places have dug up and replaced perfectly good rail simply because it was corrugated.

Regards,

> On 20 Jul 2017, at 8:45 am,transitclassics@... [TramsDownUnder] TramsDownUnder@...> wrote:

>

> Unfortunately,

>

> Toronto, like Melbourne, decided they don't need them any more and have been gone for years, indeed the lead car of the streetcar

> grinding train (ex-Cleveland Pullman) is now a passenger car again at Halton county, it's rather odd as it is still painted as the

> works car outside and has yet to get it's standee windows put back in!!

>

> But this "train" type grinding set was what I had in mind for two Z's to be used as a grinding train.

>

> Greg

>

>