What are the differences between Train Dispatcher 3 and Train Dispatcher 2?

The following is a brief list of some of the new features of Train Dispatcher 3:

• The number of platforms, signal, switches, and blocks have been greatly increased. There can be up to 100 platforms, 1,000 switches, 1,000 signals, and 2,000 blocks.
• Simulations can run for multiple days up to 90. (TB3 territory files only).
• Routes can be cleared by designating an entrance and an exit signal (Union routing).
• Routes can be stacked. Users can specify up to 5 stacked routes per signal that will automatically be cleared for the next train, after the previous route has been completed or canceled.
• Trains can be given permission to proceed past a red signal.
• Trains can be merged or split into two trains.
• The user can request a train to stop anywhere on the territory.
• Trains can be reversed at any location in a block and in blocks that are used to enter or exit the territory.
• Helpers may be required in order for some train types to move through some blocks. (TB3 territory files only).
• Trains scheduled to arrive on the territory can be easily displayed by clicking on an entrance/exit location.
• Trains scheduled to stop at a platform can be easily displayed by clicking on a block that contains the platform.
• The user may be required to give permission before trains can enter the territory at designated locations. (TB3 territory files only).
• Crews can expire because their time on duty has exceeded the 12-hour limit.
• The user can call crews and specify where the crew exchange will occur for a given train.
• Block permits and slow orders can be scheduled for different days of the week.
• The user must grant permission before a block permit can go into effect.
• Some entrance/exit locations can be designated as yard entry locations, and the user can specify how often trains can enter the yard (leave the territory). (TB3 territory files only).
• Slow orders can be made permanent.
• Diamonds (at grade crossings) are supported. (TB3 territory files only).
• Diamonds used as part of a junction with a foreign railroad can specify how often a train on the foreign railroad with be cleared over the diamond. (TB3 territory files only).
• Diamonds can be set up for automatic signaling which allows conflicting routes to be cleared over the diamond at the same time. The first train that hits the approach block to the diamond gets the route. (TB3 territory files only).
• Trains can be scheduled to perform local work in designated blocks. (TB3 territory files only).
• Signals can fail and require a maintainer to fix.
• When switches fail, the user can specify that a train crew can manually throw the switch.
• Train OSs are recorded and a train graph can be displayed. (TB3 territory files only).
• A simulation can be recorded and later played back.
• Train schedules, block permits, and slow orders can be changed in Train Dispatcher 3.
• Trains can develop problems (such as a broken hose).
• Locomotives can develop problems that degrade the performance of the train.