In the Works

While it is still too early to make any official announcements regarding the exact contents of the next official release of EMME/2, here is --as a kind of ``sneak preview''-- a list of some functional enhancements which have already been completed and which will become available with the next release:

• Up to now, auxiliary transit times were specified at the mode level either by a constant speed or by a constant auto time factor, but there was no possibility to define them directly at the link level. This limitation will be removed by introducing link specific auxiliary times. These are computed by multiplying a link user attribute with a mode specific factor.
• The possibility of specifying an additional turn attribute has been added to the additional options of the EMME/2 auto assignment. This will allow detailed path analysis not just based on link attributes (as was the case up to now), but also taking into account arbitrary turn attributes.
• In the EMME/2 transit assignment, the effective headways were up to now always handled as a line attribute (defined either as the actual line headways, or as a transit line user or extra attribute). In addition to this, segment specific effective headways will also be supported. This will not just allow more detailed modeling of transit networks, but it will also be instrumental in the implementation of congested transit assignment macros in which the waiting times are affected by the on-board congestion.
• Two-way link operations have been supported by the interactive base network editor (module 2.12) ever since Release 4, but no similar feature was so far available for batch input. With the next release, new symmetrical two-way link batch operations will be introduced.
• Up to three new extra function parameters will become available for volume-delay and turn penalty functions. Each of these parameters can be associated with an extra attribute of the corresponding type during the assignment preparation. This will allow more flexible and direct coding of complex functions which require more than the three generic parameters available by accessing the link or turn user data items.