There could be various reasons for the fork in the tram tracks, including turning a tram around. I actually think it fits with this part of the map, which isn't that detailed:

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Topic	Date Posted	Posted By
That large Chiswick Tram picture at the Metro Bank	04/09/12 01:09:00	Jim Lawes
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 01:12:00	Jim Lawes
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 07:46:00	Rachael Spencer
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 07:54:00	Paul Fisher
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 09:32:00	Tim Henderson
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 11:29:00	Ian Wylie
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 11:33:00	Ian Wylie
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 11:39:00	Edward Przepiora
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 11:43:00	Richard Greenhough
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 11:52:00	Ian Wylie
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 12:29:00	Rachael Spencer
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 12:43:00	Ian Wylie
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 15:29:00	Steven Trembath
Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:48:00	Rachael Spencer
Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:53:00	Steven Trembath
Re:Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 17:04:00	Rachael Spencer
Re:Re:Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 17:23:00	Steven Trembath
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 15:33:00	Steven Trembath
Dad the link before this	05/09/12 08:54:00	Rachael Spencer
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:09:00	Steven Trembath
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:20:00	Jim Lawes
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:31:00	Oliver Gibb
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:31:00	Angela Peel
Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:38:00	Angela Peel
unicorn gate hampton court palace	04/09/12 16:47:00	Oliver Gibb
Re:unicorn gate hampton court palace	04/09/12 16:50:00	Steven Trembath
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 16:51:00	Theresa Watt
Combined with...	04/09/12 16:58:00	Chris Andrews
Re:Combined with...	04/09/12 17:00:00	Steven Trembath
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 17:29:00	Adam James
Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 17:36:00	Theresa Watt
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 18:17:00	Ian Wylie
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 18:49:00	Steven Trembath
Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 19:04:00	Ian Wylie
Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 19:45:00	Steven Trembath
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 19:48:00	Oliver Gibb
Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 19:52:00	Chris Andrews
Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 20:00:00	Oliver Gibb
Re:Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 20:13:00	Chris Andrews
Re:Re:Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	04/09/12 21:01:00	Chris Andrews
Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 22:10:00	Delilah Hall
Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 22:24:00	Ian Wylie
Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 22:41:00	Delilah Hall
Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 22:47:00	Delilah Hall
Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 23:20:00	Steven Trembath
Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 23:24:00	Steven Trembath
Re:Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 23:35:00	Jim Lawes
Re:Re:Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	04/09/12 23:59:00	Steven Trembath
Re:Re:Re:Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	05/09/12 00:07:00	Steven Trembath
Re:Re:Re:Re:Re:Re:Re:Strange Mystery of the Trophy Gate/Tram picture..	05/09/12 00:46:00	Dave Jervis
Reward?	05/09/12 01:08:00	Oliver Gibb
Re:Reward?	05/09/12 01:13:00	Oliver Gibb
Re:Re:Reward?	05/09/12 17:14:00	Jim Lawes
I think I'm wrong....	05/09/12 01:46:00	Dave Jervis
Re:I think I'm wrong....	05/09/12 03:09:00	Delilah Hall
Re:Re:I think I'm wrong....	05/09/12 10:47:00	Douglas Watt
Trams at Hampton Court terminus (not THE tram though)	05/09/12 11:52:00	Delilah Hall
Re:I think I'm wrong....	05/09/12 11:18:00	Steven Trembath
Re:Re:I think I'm wrong....	05/09/12 11:52:00	Richard Greenhough
Re:Re:Re:I think I'm wrong....	05/09/12 13:03:00	Steven Trembath
Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 14:48:00	Paul Richardson
Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 14:59:00	Ian Wylie
Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 15:08:00	Delilah Hall
Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 15:14:00	Steven Trembath
Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 17:17:00	Jim Lawes
Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 15:34:00	Rachael Spencer
Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 15:52:00	Paul Richardson
Re:Re:Re:Re:That large Chiswick Tram picture at the Metro Bank	05/09/12 17:18:00	Jim Lawes
Rachael's Dad's model Chiswick Tram under construction.	06/09/12 02:34:00	Jim Lawes

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