Title
----- 
Commuter Train v1


Goal
----
Running a commuter (passenger) train on a track makes it more realistic
when it stops at the stations. This solution supports 3 stations to stop
at with a random interval.


Solution
--------
On the track plan choose maximal 3 locations to let the train stop. Mark 
the stop position of the locomotive on the track. Determine the position
where the train should slow down to stop eventually at the station. Put
a light sensor at that location and use for the other 2 locations the same 
distance between the stop position and the light sensor.
Start playing around with the NQC file to meet your requirements. This 
solution requires a RCX brick with power jack because the track is 
continously powered by the RCX brick because the RCX also controls the 
speed of the approaching train at the station. Advantage of this solution 
is that the train may consist of two motors, even at the beginning and 
end of the train.


Bill Of Materials (for two buffers)
-----------------------------------
1x RCX with Power Jack
3x Light Brick
3x Light Sensor
1x Train Track Contacts
.. Electric Wire
.. Track Straight/Curved


Limitations
-----------
It takes a while to modify the .NQC file to fit for your own needs. But
I've noticed that the train will not stop always at the exact location
and I think this probably has something to do with the length of the
track and the overall voltage on the track. Not sure right now ...


Remark
------
The setting is the .NQC file are used to let the 4560 Railway Express
stop at two random stations. The train stops within 6 pieces of track.




Stefan Sanders
StefanSanders@Wanadoo.nl