When you perform an itinerary search, the results are governed by a set of parameters
recorded on the Parameters tab of the Itinerary Planning screen.
The following graphic shows the Parameters tab with sample values applied to selected
parameters:
Parameter
Description
Default
Value
CTM Engine/CTM Server
INFO-
Engine
Maximum Stop Distance (Origin)
Farthest distance that the departure stop is away from the origin. This is used
in conjunction with the Stop access method (Origin) parameter.
X
X
Maximum Stop Count (Origin)
Maximum number of stops within the specified stop distance (see Maximum Stop
Distance (Origin), closest to the origin point, that will be considered in the
algorithm. If there are fewer stops than this number within the specified distance,
this parameter is ignored. This parameter effectively reduces the superfluous number
of stops that can be found within the realistic walking distance in the areas with
numerous closely spaced stops (typically downtown). To turn off this parameter, set it
to a very high number - in this case, Max Walking Distance (Origin) will be the
limiting factor.
20
X
X
Stop Access Method (Origin)
The three stop access methods are:
Circle – The stops that will be considered by the
algorithm that are closest to the origin using a point to point (as the crow
flies) calculation method.
Street Network - The stops that will be considered by the
algorithm that are closest to the origin using a calculation method that takes a
path along the street network (also referred to as walkout).
Note: If the Trace
Options switch,Report Street Walking Distances is
enabled, the walking distances at the origin, destination, and at transfers are
shown via the Street Router method. This system setting is for CTM
only.
Barrier - The stops that will be considered by the
algorithm using the circle method plus pre-created polygons defined as barriers.
Note this method is only used by CTM Server.
X
X
Street Network Access (Origin)
Determines how the walking distance is calculated based on the vehicle
class.
Street Network Access (Destination)
Determines how the walking distance is calculated based on the vehicle class.
(Same as Street Network Access (Origin)
Maximum Stop Distance (Destination)
Farthest distance the departure stop is away from the destination. Used in
conjunction with the Stop access method (Destination) parameter.
X
X
Maximum Stop Count (Destination)
Maximum number of stops within the specified walking distance (see Max Walking
Distance Destination), closest to the destination point, that will be considered in
the algorithm. If there are fewer stops than this number within the specified
distance, this parameter is ignored. This parameter effectively reduces the
superfluous number of stops that can be found within the realistic walking distance in
the areas with numerous closely spaced stops (typically downtown). To turn off this
parameter, set it to a very high number - in this case, Max Walking Distance
(Destination) will be the limiting factor.
20
X
X
Stop Access Method (Destination)
The three stop access methods are:
Circle – The stops that will be considered by the
algorithm that are closest to the origin using a point to point (as the crow
flies) calculation method.
Street Network - The stops that will be considered by the
algorithm that are closest to the origin using a calculation method that takes a
path along the street network (also referred to as walkout).
Note: If the Trace
Options switch,Report Street Walking Distances is
enabled, the walking distances at the origin, destination, and at transfers are
shown via the Street Router method. This system setting is for CTM
only.
Barrier - The stops that will be considered by the
algorithm using the circle method plus pre-created polygons defined as barriers.
Note this method is only used by CTM Server.
X
X
Maximum Stop Distance (Extended)
Maximum distance to look for stops if no stops are found within the Max Stop
Distance parameters (Origin or Destination). The stops found using this parameter will
use the Circle Stop Access method (point to point).
X
Maximum Walking Distance (Transfer)
Farthest walking distance allowed to/from a bus stop at transfer
locations.
100 m
X
X
Maximum Stop Distance from a Transit Access Path
The perpendicular distance the stop is away from the street segment that the
algorithm will use to search for the stop.
X
X
Early Leeway Time
The window or interval before a departure or arrival time in which the system
looks for stop times (for example, when conducting itinerary searches within a 30 minute time
window, the system searches 30 minutes prior to a specified departure time).
30 min
X
X
Late Leeway Time
The window or interval after a departure or arrival time in which the system
looks for stop times (for example, when conducting itinerary searches within a 30
minute time window, the system searches 30 minutes after a specified departure
time).
30 min
X
X
Min Transfer Time
Minimum layover (i.e. time between alighting one vehicle and boarding the next
one). This can be overridden for specific transfers. This parameter is ignored for
no-cost transfers.
2 minutes
X
X
Max Transfer Time
Maximum layover time (i.e. time between alighting one vehicle and boarding the
next one).
1h00
X
X
Max Itinerary Time
Maximum duration of a trip from the time the passenger boards the first vehicle
and alights the last vehicle (including layovers).
3h00
X
X
Predefined Itineraries
This parameter controls whether the predefined itineraries (also referred to as
saved itineraries and favorite itineraries) are going to be applied in a search. By
default, they will be applied disregarding the Max Number of Transfers parameter.
The three options are:
No
Unlimited Transfers
Limited Transfers
Unlimited Transfers
Min Number of Transfers
The minimum number of countable transfers for the itinerary that are going to be
considered as valid solutions. No cost transfers within the same line are not
considered countable, and therefore they are ignored for this purpose.
0
X
Max Number of Transfers
The maximum number of countable transfers allowed in a given trip plan. No cost
transfers within the same line are not considered countable, and therefore they are
ignored for this purpose.
1
X
Min Transfer Level
This parameter requires that only transfers of a specified level or better be
used in planning itineraries. Type a number from 1 to 10 (where 10 is the category of
least preferred transfer). The default value is 10 (use all transfers). You can
determine transfer levels per transfer in the Transfer Wizard by editing a transfer or
in the Automatic tab.
10
X
Expand Extent
The algorithm generates itineraries in two stages:
In the first stage, it generates the layouts of the possible solutions taking
into consideration only the line/direction combinations, regardless of stops at
which the transfers are made.
In the second stage (Generating itineraries), in order to be able to determine
whether the times can be assigned at the specified time of day, the layouts are
expanded so that they represent the actual solutions with the particular transfer
stops. Each layout is expanded into a number of actual itineraries which are
ordered by the quality of their transfers (i.e. their transfer levels) and
subsequently timed.
By default (when Expand Extent is 0), all these itineraries
are timed and the best one is kept as the solution. Setting the Expand Extent
parameter to a number (for example, 3) directs the algorithm to time at most 3 of the
different transfer combinations, thus saving some time that would be spent on
evaluating the itineraries that are less likely (due to the quality of their
transfers) to produce desirable solutions.
0
X
Discard Overshoot
This parameter determines whether a transfer can be made within the
Origin/Destination stop set. The four modes for this parameter are:
1 (Discard all transfers within origin/destination stop set in sequence
order).
0 (Discard all transfers within origin/destination stop set).
-1 (Discard transfers within origin/destination stop set except for no cost
transfers.)
-2 (Allows all transfers.)
0
X
Max Number of Itineraries
The maximum layover time the system will allow on board a single vehicle.
10
X
X
Optimize Itineraries by Trip (Pattern)
By default, the algorithm tries to assign the times for the generated itineraries
starting with the closest stop on the particular line/direction. However, on loop
routes it can happen that the closest stop that yields results is on the direction
that sends the passenger around the loop, rather than one that is a little farther
away but would provide much quicker itinerary. Setting this parameter to 1 (that is, on)
makes the algorithm generate solutions that may be in the same (scheduled) direction
but not necessarily the closest stop. To turn this parameter off, set the value at
0.
0
X
Optimize Itineraries by Trip (Pattern)
When this parameter is set to 1 (that is, On), the algorithm generates solutions
that may not start with the closest time but rather searches all patterns until the
best solution is found. To turn this parameter off, set the value at 0.
0
X
Accessibility
This parameter determines the accessibility required for the trip plan.
Accessibility types are defined in the FX - Accessibility ancillary data
screen.
0
X
X
Lines
This parameter lets you specify which transit lines should be used or avoided in
the solutions generated for the particular request. When you click the down arrow in
the Value field, the Lines Selection dialog opens.
Selecting
a check box next to a line produces the following settings for the algorithm:
Suppressed: A red X tells the system not to consider
solutions which include the suppressed line and direction combinations. This
line is denoted with a minus symbol (-)-) in the Value field.
Required: A black check mark tells the system to
consider solutions from the line as long as the solutions include all of the
desired and required lines. These lines are denoted with a plus
symbol (+) in the Value field.
Desired: A check mark with a gray background tells the
system to consider solutions which include at least one of the desired or
required line and direction combinations. These lines are denoted with an
asterisk (*) symbol in the Value field.
[None]
X
X
Modes of Transportation
Provides the user the ability to include or exclude specific modes of
transportation (for example, exclude “Rail”).
Note: You can add the Modes of
Transportation parameter to the Step Sets in CTM Parameters.
Bus[+],
Demand[+],
Ferry[+],
Flex[+],
MOBMGT[+],
PROJMAIN[+],
Rail[+]
X
X
Personal Mode of Transportation for Entire Trip
Allows you to select the mode of transportation that the client uses for an
entire trip. From the Value list, select the appropriate mode of
transportation.
[None]
Default Passenger Type
Determines which predefined passenger type is the default value on the request
tab. This passenger type fare is the one shown in the Fare column of the Details tab.
Passenger types are defined in Faring/Fare Types ancillary data.
[None]
X
X
Default Itinerary Sort
Determines which sort order is the default for the parameter set. This parameter
works in conjunction with the sort icons (By Time, By Walking Distance, By Number of
Transfers, and By Lowest Fare). That is, when you select the corresponding icon in the
toolbar, this parameter value changes and vice versa; when you select another sort
order in the Parameters tab, you can see the corresponding sort icon
activated.
Duration (By Time)
X
X
Step Set Name
The name of the step set that controls the number of steps performed for the
particular search as well as their order and the parameters associated with
them.
[None]
X
Accessibility at Origin
Determines the predefined accessibility type that will be applied as the default
to the origin stop on the Request tab (for example, if the stop is equipped with a
bike rack). You may choose “None”.
[None]
X
Accessibility at Destination
Determines the predefined accessibility type that will be applied as the default
for the destination on the Request tab. You may choose “None”.
[None]
X
Min Stop Distance (Origin)
Minimum distance you need to travel to get from your origin to the departure bus
stop.
0
X
Min Stop Distance (Destination)
Minimum distance you need to travel to get from your destination stop to your
final destination.
