You add more complexities to a tram and you end up with more things to go wrong and disrupt the service.

Any number of things can cause a car ahead collision but nearly always it comes back to the driver not taking into account circumstances such as leaves on the track and going to fast in such situations.

Or simply daydreaming or otherwise distracted.

Regards,

> On 22 Jul 2017, at 3:17 pm, 'Noel Reed'noelreed10@... [TramsDownUnder] TramsDownUnder@...> wrote:

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> I assume that most Melbourne ‘car ahead’ collisions would happen on busy city streets or straight sections such as St Kilda Rd during peak periods when trams follow each other closely and . Do statistics support this opinion ? If so, that is the time for the drivers to be very alert and use technical assistance in safely managing closing speed. A car ahead collision can result in injury to standing passengers as well as costly damage to the trams, and also delays in services.

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> Noel Reed.

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> From:TramsDownUnder@... [mailto:TramsDownUnder@yahoogroups.com]

> Sent: Saturday, 22 July 2017 10:25 AM

> To:TramsDownUnder@...

> Subject: Re: [TramsDownUnder] Car ahead on the 86 ?

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> On Sat, Jul 22, 2017 at 10:14 AM, 'Noel Reed'noelreed10@... [TramsDownUnder] TramsDownUnder@...> wrote:

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> Wouldn’t an anti collision system between trams be an advantage in streets where other options such as permissive signals [as in Wynyard tunnels] or ATP with or without signals cannot be used to space moving trams safely apart.

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> Such a system would have to distinguish between trams on adjacent tracks. On curves, that may be particularly difficult.

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> Hal Cain

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> Virus-free. www.avg.com

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