27-04-2011, 08:33 AM
1) 4-asp is the most obvious answer but there are better options which would reduce the 'cost' by minimising the number of signals but that requires some complex understanding of aspect sequences.
2) Yes it is okay to use shunt moves but why not use main aspects? Less restrictions on speed and would clear the mains faster.
3) 2-asp is more than ample and simple to implement. You may want to consider the 'one train in steam' principle of operation. No track circuits then except on the exit berth signal.
Jerry
2) Yes it is okay to use shunt moves but why not use main aspects? Less restrictions on speed and would clear the mains faster.
3) 2-asp is more than ample and simple to implement. You may want to consider the 'one train in steam' principle of operation. No track circuits then except on the exit berth signal.
Jerry
Le coureur