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V4.2.2DonationwareSL20/12/2013Available from Download section
V4.1DonationwareSL05/11/13No longer available for download
V2.227DonationwareS21/08/11No longer available for download
V2.101DonationwareV06/06/05No longer available for download
V2.8DonationwareV08/05/03No longer available for download


Westbury Summer 2007 v4.105/11/13TBCBundled with V4.1
Westbury Summer 2007 v2.22619/08/11TBCBundled with V2.227
Westbury 85TBCKurtDSAvailable from Download section
Westbury 1922TBCtonyreeseAvailable from Download section
Westbury 1981TBCEd JeffreyAvailable from Download section
Westbury: Swindon DiversionTBCEd JeffreyAvailable from Download section
Westbury Fictional Winter 2009 - Diversion mayhem08/02/10UnderwoodAvailable from Download section
Westbury timetable for 15th Oct 0922/08/11NoisynoelAvailable from Download section
Westbury13/03/12agilchristAvailable from Download section
Westbury Tours and Diversions Summer 2011 Semi-Fictional10/04/12UnderwoodAvailable from Download section


Welcome to SimSig Westbury! Westbury is another non-IECC location to take advantage of the authentic SimSig simulation model. All the usual SimSig features are included in this simulation which shows what Westbury may look like if it was controlled by an IECC.

About the Westbury Area

In SimSig Westbury, you will control most of the Berks & Hants line that runs between Westbury and Taunton via Westbury. The entire Westbury Panel box area is covered, along with the B&H panel of Reading Panel.

The length of route is quite considerable - 100 miles from Aldermaston to Athelney, which takes even High Speed Trains well over an hour to cover. Add to that 40 more miles of branches - Bathampton and Thingley Jns to Warminster, Castle Cary to Yeovil, and the Merehead Quarry branch.

Much of the route consists of widely spaced signals, especially on the western/southern end. It is mostly 3-aspect signalled, although there are some 4-aspect signals around Newbury and Westbury. Other branches and beyond Castle Cary are 2-aspect signalled with repeater signals.

In real life, the area is controlled by two signal boxes. Reading controls (amongst others) the area depicted on view 1. Westbury controls the remaining three views. Reading is a turn-and-push illuminated panel, traditional Western style. The signalbox is over 30 years old now and is likely to be replaced within the decade. To set a route, the signaller must turn a switch at the entrance signal and then press a button at the exit signal - hence “turn and push”, also known as “twist and push”. Routes have to be cancelled manually behind the train by restoring the switch back to the vertical-pointing position. Westbury is a more modern signalbox, employing the NX push-push style of routesetting and dates from the 1980s.

Multiplay and Chaining

  • Link with Swindon, Bristol and Exeter
  • Suitable for one person operation although two will make it easier



Westbury fringes to six signalboxes. There are also several yards and sidings.

Reading Fringe

The part of the route that is nearest to London. The trains enter and leave this fringe as they pass Southcote Junction and come under your control near Aldermaston. The fringe consists of two tracks (Up and Down). The signalbox is called Reading.

Bristol Fringe

There is one fringe to Bristol, between Bradford Junction and Bathampton Junction. Trains enter and leave at Bathampton Jn.

Swindon Fringe

A single line connects Bradford Junction to Thingley Junction. You are in control of this section and Swindon will therefore ask for a slot when (s)he wants to send you a train. Trains enter at Wootton Bassett Junction to give you plenty of warning.

Salisbury Fringe

Wilton Junction is where trains enter and leave. Salisbury panel is the adjacent signalbox.

Exeter Fringe

The main line connects to the Bristol line at Cogload Junction. Exeter controls this junction and hands over control to you after the level crossing at Athelney. Trains enter and leave at Cogload Junction.

Yeovil Fringe

The passing loop and junction at Yeovil Pen Mill is controlled by the signalbox of the same name. The single line is controlled by you - you grant the slots to Yeovil.



The main focus of the simulation. Westbury has three passenger platforms and two goods tracks. There is a yard on the Up side of the station, which is used for stabling passenger stock and also is used by freight. There is another set of yards on the Down side of the station which are just for freight.

Some passenger trains will stop here for more than just a minute or two. Watch out for them as you can easily lock up the station if you set route too early.


A regular service to London operates from here, using the bay platform. In addition, there are two through platforms and two through tracks. Be aware that some down trains are timetabled to use platform 2 as that is the main exit of the station. Some HSTs (headcode 1Cxx) overtake local services here, either by using platform 2 or the through lines.


Home to another service from London, a turnback siding exists for those trains. Some trains stay in the siding for a while, so check nothing is coming up from Westbury before letting him out.


A tiny station for a tiny service but still retains a respectable overall roof. Two fast lines exist some distance away from the station, the station itself being on a loop.

Access to Whatley Quarry is at Frome North Junction.

Castle Cary

A three platform station where the Yeovil line diverges.


A town with a large military presence due to the proximity of Salisbury Plain and its firing ranges, training grounds, MOD bases, flying saucers, etc. Some trains turn back here just to the south of the station.


County Town of Wiltshire and (past) home of your author!

Bradford on Avon

Not hyphenated - the locals get very agitated if you do. As for the trains, don't set route for trains towards Trowbridge that stop at Bradford until they press the TRTS indicator. The reason for this is the AHB crossing on the other side of the tunnel. The strike-in point for stopping is different to the strike-in point for fast trains, so the risk is that a stopping train will have the AHB barriers down several minutes before it actually crosses the crossing. Many car drivers will unfortunately drive around the barriers after waiting and risk a collision. Apparently this is one of the most dangerous level crossings in the country because of the sighting, right outside a tunnel, plus a fairly sharp curve obscured by trees on the other side. Of course, if drivers heeded the flashing lights and lowered barriers…..

East Somerset Junction

It is not possible to set routes from W275 to W277 at the same time as routes from W75 to W77 or W77 to anywhere unless the track circuit in the Branch Loop is occupied. This is as per the real box.


The whole area is controlled by Multiple Aspect Signalling. Many of the signals around Newbury and Westbury are four aspect because of the closer headways required of this section. Much of the rest of the area is three aspect with two aspects and repeaters for branch lines and some of the extremities of the area.

Signals prefixed “R” are Reading Panel signals, such as R123; the remainder belong to Westbury (note that this is different from repeater signals, which are suffixed “R”, as in 123R).

Junction Working

Many junctions use approach control, where the train is slowed by restrictive signals until the interlocking has timed it to be at a suitable speed approaching the junction, whereupon the signal will show a less restrictive aspect if the track ahead is clear.

Level Crossings

There are several level crossings but none under your direct control. Set a route over the crossing to indicate to the crossing keepers that a train is coming. Do not do it too early otherwise you annoy the road users!

Permissive Working

It is possible to allow more than one train into the platform lines at Newbury, Westbury and all the goods lines. The lines are said to be permissive. Clearing a route into such a line when the platform track circuit is occupied will select a ‘call-on’ route. The signal will clear with a subsidiary aspect subject to the following conditions:

  • That the platform track is occupied;
  • That at least one track circuit between the incoming train and the end of the platform is not occupied;
  • That the train to be called-on has been timed to, or nearly to, a stand at the entrance signal.

It should be noted that if the route for the second train is set before the first train operates the platform track circuit, then the signal will not clear until the first train has gone clear or the route has been cancelled and called again.

Most ground shunt signals will clear into these sections whether they are showing occupied or not.

Another use for these call-on routes is that it is still possible to clear a protecting signal into such a section which has a track circuit failure.

Permissive working is banned for passenger trains unless they are booked to join another train.

Line Speeds

Line speeds vary, the following is a typical average for that line:

  • Mostly around 100mph all the way along the Berks and Hants Main Line
  • 60-70mph for the Bathampton - Westbury line
  • 15mph around Westbury East Curve
  • 40mph through Westbury
  • 75mph on the Warminster line
  • 40mph on the Frome loop

Platform Lengths

(extracted from 1/4/2009 Route Capability Plan)

Midgham Dn 97m/106y 117m/128y
Thatcham Dn P1 147m/160y Up P2 155m/170y
Newbury Racecourse P1 Dn 87m/97y P2 Up 74m/81y DPL 208m/225y
Newbury P1 DPL 291m/318y P2 Up 327m/358y P3 bay 129m/141y - Loops DPL 442m/1459ft UPL 359m/1176ft
Kintbury P1 Dn 105m/115y P2 Up 106m/116y
Hungerford UPL 679m/2226ft
Hungerford Dn P2 150m/164y P1 Up 153m/167y
Bedwyn Dn P1 121m/132y Up P2 123m/135y
Pewsey Dn P1 170m/186y Up P2 177m/194y
Woodborough DGL 640m/2100ft UGL 666m/2184ft
Westbury P1 224m/245y P2 203m/222y P3 197m/215y
Frome 109m/119y - UGL 327m/1071y
East Somerset Jn U/DGL 532/1743ft
Bruton P2 Dn 144m/157y P1 Up 130m/142y
Castle Cary P1 198m/217y P2 197m/215y P3 70m/77y - D/UPL 487m/1596ft
Trowbridge P1-Dn 108m/118y P2-Up 154m/168y
Bradford-on-Avon Up & Dn 120m/131y
Avoncliff Up & Dn 30m/33y
Freshford Dn 78m/85y Up 82m/90y


There are a few things that may help with inputting timetables that need mentioning. They are summarised below.

When inputting trains into the editor, certain locations must be included to satisfy the editor’s requirements. These reflect the key timing points on the routes in the area simulated.

Below are the most important rules about the editor when inputting timetables….

Key Locations

All trains passing through the following locations must list them in their timetable:

  • Bathampton Junction
  • Thingley Junction
  • Chippenham
  • Wootton Bassett Junction
  • Bradford Junction
  • Westbury
  • Heywood Road Junction
  • Warminster
  • Wilton Junction
  • Frome
  • Fairwood Junction
  • Clink Road Junction
  • Blatchbridge Junction
  • East Somerset Junction (for Merehead trains only)
  • Castle Cary
  • Yeovil Pen Mill
  • Cogload Junction
  • Lavington
  • Woodborough
  • Bedwyn
  • Newbury
  • Southcote Jn

Yards and Quarries

The Westbury yards, Whatley Quarry, and Merehead Quarry all have shunters that will give you permission to enter the yard/quarry (hereafter referred to as a yard). They will also inform you when there is a train ready to leave the yard.

Departing trains

The shunter will phone you with a message of the form “WXYZ is ready at ABCD”. Take note of the location. Press I to Interpose and enter the train description, i.e. WXYZ. Click Ok and then click on the exit signal to the appropriate yard. Set the route when appropriate - the train will be ready to leave pretty much straight away.

Arriving trains

Each yard can only accept one train at a time. Therefore the yard should only be informed when the train is approaching the yard. However, you should give yourself enough time to be able to put the train somewhere if the yard cannot accept it for a few minutes.

Click on the telephone icon and then on the dialler button. Select the yard that the train is to enter and press Dial. When the call is answered (which may take a while if the shunter is busy), select the message (accept WXYZ) and type the train description. If accepted, you'll see the train description that has been accepted next to the yard entrance, plus a release for the signal (a solid white circle). You can now set the route into the yard.

If you send the wrong train in, i.e. one that hasn't been accepted, you'll be penalised!

Merehead Departures

Most trains from Merehead will be backed out to Whites Crossing Siding before proceeding forward towards East Somerset Junction.

Melksham and Yeovil Slots

The slots for the Melksham and Yeovil branches are automatically requested by trains exiting the Sim. Trains entering the Sim from these locations must get permission from you before they can send a train onto the line. When they wish to do so, the slot indication for the appropriate line will flash. If you are prepared to accept a train, click on the slot and it'll go steady. The route for the train will set automatically.


Standard train descriptions are used in SimSig. The character coding shown below can be used as a rough guide as to where the train goes when using the timetable supplied with the software. The coding of train descriptions changes from time to time to suit traffic requirements, therefore, the coding provided may not apply to timetables from other time periods.

The first character (digit) indicates the classification of the train:

0 - Light loco(s)
1 - Express passenger train, postal, or mail train as well as various other trains like locomotives setting out to rescue a failed train
2 - Ordinary passenger train, and a few other types
3 - Parcels train
4 – High speed freight, generally Freightliner trains
5 – Empty coaching stock train
6 to 8 – freight trains of various speeds
9 – Eurostar Train (None in this area)

The second character (letter) indicates the destination/origin area (the list below is a rough guide):

A – Trains to London Area (Paddington etc.)
B – Trains between London, Worcester, Cheltenham, and South Wales
C – Trains between London and Bristol area
F - Cardiff to Portsmouth service and vice versa
K - Bedwyn trains
M – Trains for the Midland Zone, also some Melksham services
O – Trains that terminate in the Southern Zone
\ S – Trains heading towards Scotland
V – Trains heading toward the Western Zone from other Zones
X – Special trains and out of standard loading gauge trains
Z – Special trains and Short Notice Workings

The third and fourth characters (digits) indicate the individual train reporting number.

Things to watch out for

Remember that some of the sections are very long, particularly if a repeater signal is involved. Make sure you don't lock up a junction for a train that is still several miles away.

The Melksham branch is long and single. Before you allow a train to set off from Westbury for Melksham, check that you'll be able to get it on there without delaying a following train for Bathampton Jn. Hold it at Westbury if necessary.

Automatic Routesetting

Westbury does not have any automatic routesetting (save for the slots (above)) or automatic code insertion. It is completely manual - you have to do everything by yourself. It'd be too dull if ARS was allowed to do anything!

V2.227 variations

  • Several locations that were missing have been added. (Hungerford Goods Loop [GDS LOOP] is still not labelled, but is the loop between Hungerford and Kintbury on the UP line.)
  • Barrow crossing at Westbury Station; there is a delay of 10-15 seconds between setting a route and the signal clearing.
  • You need to seek permission to route trains into a number of yards and sidings and quarries. This is done from the Telephone menu. Note only trains heading for Merehead “ARR” need permission, trains can shunt into the “DEP” end at will. At some locations you will be given a specific siding to enter, you will be scored on the correct use.
  • Permission for trains to enter will be made from several yards, sidings and quarries.
  • You need to grant a slot to Swindon to allow trains to enter from Chippenham/Thingley Junction over the Melksham single line. Exiting trains do not need permission from Swindon.
  • Anti-gridlock action taken at Thingley Jn, the exiting trains will now fall-off the Sim earlier and locations Chippenham and Wootton Bassett are no longer required in them.

V4.2.1 variations

  • Trains exiting Yeovil and Melksham will auto request their Slots
  • Trains entering at these laocations are slotted by setting the requisite route from the slotted signal
  • Extensive revision of the signal approach release and approach locking

V4.2.2 variations

  • Fine tuning of the signal and approach locking
  • TORR is only available in options Perfect and Beginner

View of Westbury North end
View from Google Maps showing the north end of Westbury station - note the barrow crossings


Scrolly keyboard number locations

Pressing these keyboard numbers centres the active view window at these locations:

1 - Left-hand end of panel
2 - Newbury station
3 - Trowbridge station
4 - Westbury station
5 - Clink Road Junction
6 - East Somerset Junction
7 - Right-hand end of panel

Additionally, mouse wheel forward scrolls the sim to the left, backward to the right.

Locations of level crossings

Numbers correspond to keyboard view numbers (above)

A - G F - P S - W
Avon View 3 Frying Pan Farm 3 Staverton Farm 3
Cemetery Lane 3 Hamstead 1 Thatcham 1
Colthrop 1 Hapsford 6 Thorney Marsh 7
Cross Cottage 7 Hungerford 1 Tuckers 3
Dennings 6, 7 Kintbury 1 Waldens 3
Forrestry 7 Midgham 1 Westbury (barrow) 4
Greenland Mill 3 Parsonage 7 Whites 7

Milepost numbers

Mileposts are shown at selected locations. These are measured from London Paddington (Southcote- Cogload & the branch to Yeovil), from Westbury (towards Bathampton/Thingley and Wilton), or from junctions with the main line (Merehead and Whatley).


This version of Westbury is not 100% bug free. Rather than hold it back until it is perfect, which may be never, we have taken the decision to release it as-is. Please respect that, because otherwise you would never have had it at all! If you do find bugs, please post on the forum under the Westbury board but don't expect a response or any action to be taken. Maybe, maybe not, we can't promise anything.

One other thing to remember - even the real thing has bugs! Nothing safety critical, so don't get concerned. More minor glitches, like having to turn the TRUST monitor on its side to turn it on (somebody will know what I mean).

No bugs currently reported

See also: Known Loader bugs

A final note

If you fancy writing a timetable from a different period of time, then please have a go. Perhaps you might like to alter the timetable provided. If you think you have created a masterpiece of a timetable, then we would love to see it, maybe it could be posted on the SimSig website for others to download. Remember that SimSig timetables are for use with SimSig only and not for any other use.

We hope that you enjoy SimSig Westbury and thank you for your support. Keep up to date with all things SimSig by visiting our website which includes a forum page for posting news and views about SimSig. Have fun.

Reference Section

Signal Number Plan

Route Tables

Note the signal number plan is based on the paged version.

Signal Box prefix codes

YPYeovil Pen Mill*

*Fringe box, signals not controlled by this Sim.

None-prefixed signals are controlled by Westbury (W)


Original Sim built by Geoff Mayo or Mike Miles (need to confirm who)
Major reconstruction to Scrolly by Daan Krantz, with minor fiddlings by Peter Bennet and further fiddling by Howard Potter
Clive Feather and Kurt Sickelmore assisted with data and code programming.
With thanks also to Andy Greenland, John Gallon

/home/simsig/public_html/dokuwiki/data/pages/usertrack/mans/westbury.txt · Last modified: 2014/03/11 01:25 by maxand