Network Attributes

* = User Input in Version File Network Object Table Required

Transport Systems

• a - BRT
• b - bus
• e - Streetcar
• ht - Heavy Truck
• i - KnR Access
• k - Bike
• l - LRT
• mt - Medium Truck
• r - Commuter Rail
• s - SOV
• sr2 - Shared Ride 2
• sr3 - Shared Ride 3+
• w - Walk to Transit
• wlk - Walk (as transportation)

Private Transport (PrT)

Network Attributes

1. Walk_Speed - Defines the walk speed for wlk and w transport systems over network connectors - Used in transit skimming
2. Connector_Vehicle_Speed - Defines the vehicle speed over network connectors - Used in transit skimming
3. Intrazonal_Vehicle_Speed - Defines the vehicle speed for intrazonal trips - Used to set INTRTIME on the zones and then used for matrix diagonals

Links

1. TSysSet* - Transport Systems Allowed on the link - Used to control modes by link and to filter walk links for the MAZ skims
2. TypeNO* - Link type - Used to define default speeds and clean up the network for intersection counts in the MAZ skims
3. FWY_CAP_1HR* - 1-hour freeway capacity - Used to store per hour freeway capacity
4. APP_CAP_1HR* - 1-hour approach link capacity - Used to store per hour capacity on approach links
5. MB_CAP_1HR* - 1-hour midblock capacity - Used to store per hour midblock (non-freeway) capacity
6. [Period]_METER* - Period ramp meter link capacity - Used to store per hour ramp meter capacity by period
7. HOURLY_ROADWAY_CAP - 1-hour roadway capacity - Used to store per hour roadway capacity, later multiplied by the number of hours in a period

• Metro: Gets filled by the capacity calculation steps in the procedure sequence
• SKATS: Is static

1. ADDVAL3 - User value 3 - Used as midblock capacity per period in the custom VDF function (Metro)
2. [Period]_TTC - Congested travel time by period - Used for auto skimming and transit run times
3. ADDVAL1 - Set to congested travel time by period - Used as the working field to skim congested auto time by period
4. [Period]_[Mode]_TOLL* - Toll by period and mode - Used for generalized cost calculation, gen cost = auto impedance for skimming
5. ADDVAL2 - Generalized cost by period - Used as the working field for skimming impedance
6. CapPrT - Visum's capacity field - Used in the Volume-Delay Function

Nodes

1. Boarding Penalty - Boarding penalty for transit based on the highest order transit available at the stop at that node - Used in transit skimming

Zones

1. INTRDIST - Intrazonal distance for motorized modes - Used to set the distance skim diagonal
2. INTRDIST_WLK - Intrazonal distance for walking - Used to set the distance skim diagonal
3. INTRTIME - Intrazonal time for motorized modes - Used to set the motorized time skims diagonals

Connectors

1. TSYS_HOLDING - Saves values from TSysSet - Used for KnR skimming, which adjusts the TSysSet field to temporarily accommodate the KnR (i) mode
2. ADDVAL1 - Travel time by period
3. ADDVAL2 - Generalized cost for impedance calculation

Public Transport (PuT)

Stop Areas

1. isbrt - Equals 1 if the stop serves BRT - Used for stop type determination
2. isbus - Equals 1 if the stop serves bus - Used for stop type determination
3. iscrr - Equals 1 if the stop serves commuter rail - Used for stop type determination
4. islrt - Equals 1 if the stop serves LRT - Used for stop type determination
5. isscr - Equals 1 if the stop serves Streetcar - Used for stop type determination
6. istc* - Transit center flag - Used for stop type determination
7. istm* - Transit mall flag - Used for stop type determination
8. op_bushr - Number of buses serving the stop in off peak hours - Used for stop type determination
9. sttyp - Stop type, defines the desireablity of a stop, "A,B,C" > "D" > "E" - Used to set the stc and wtpf
10. stcon - Stop type constant value depending on the stop type - Skimmed during transit skimming, with the "average stop type constant skim" being the sum of the stop type constants at the stops a path boarded a vehicle at, divided by number of boardings
11. wtpf - Wait Time Perception Factor applied to wait times depending on the stop type - Used in transit skimming

Line Routes

1. AM4/MD6/PM4/EV5/NT5* - Transit headway by period, with length in hours designations (could be changed)
2. op_bushr - Off-peak buses per hour (route level) - Aggregated to the stop area level in the transit skimming setup script

Line Route Items

1. EMME_DWT* - Dwell time from Emme network - Used to set dwell time at the time profile items level
2. EMME_TTFINDEX* - Travel time index from Emme network - Used to set transit run times

Time Profiles

1. Headway_Halved - Period headway divided by 2 - Used for "Optimal strategies" headway-based transit skimming, which incorrectly calculates wait time as the headway value, so we divide it in half preemptively
2. HEADWAY(AP) - Working headway field - NOT USER DEFINED but this is the field Visum recognizes as headway for transit skimming
3. ivpf - In-vehicle perception factor - Used to skim in-vehicle time as part of the transit impedance function. Depends on the period and transit mode

Time Profile Items

1. DWELL_TIME - Working transit dwell time - Used to funnel dwell time into each transit route at the stop level
2. RUN_TIME - Working transit run time - Used to funnel run time into each transit route at the stop-to-stop level