path table structure#
Table provides the aggregate information of the path traversed by a vehicle during simulation in POLARIS. The trajectory-specific information is logged in the Path_links table where Path (id) = Path_links (object_id)
Field |
Type |
NULL allowed |
Default Value |
Foreign key |
Description |
|---|---|---|---|---|---|
id* |
INTEGER |
NO |
Unique identifier of this path record |
||
traveler_id |
INTEGER |
NO |
0 |
The person driving the vehicle along this path (foreign key to Person table) |
|
origin_activity_location |
INTEGER |
NO |
0 |
Origin location from which this path started (foreign key to Location table) |
|
destination_activity_location |
INTEGER |
NO |
0 |
Destination location at which this path ended (foreign key to Location table) |
|
origin_link |
INTEGER |
NO |
0 |
The id of the first link in the path sequence (foreign key to Link table) |
|
destination_link |
INTEGER |
NO |
0 |
The id of the last link in the path sequence (foreign key to Link table) |
|
num_links |
INTEGER |
NO |
0 |
Total number of links that comprise this path |
|
departure_time |
INTEGER |
NO |
0 |
The time at which travel along the path began (units: seconds) |
|
routed_time |
INTEGER |
NO |
0 |
Travel time (as estimated by the router) to traverse the path (units: seconds) |
|
travel_time |
INTEGER |
NO |
0 |
Actual experienced travel time to traverse the path (units: seconds) |
|
vehicle |
INTEGER |
YES |
Vehicle(vehicle) |
Vehicle that traversed the path (foreign key to Vehicle table) |
(* - Primary key)
The SQL statement for table and index creation is below.
CREATE TABLE "Path" (
"id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
"traveler_id" INTEGER NOT NULL DEFAULT 0,
"origin_activity_location" INTEGER NOT NULL DEFAULT 0,
"destination_activity_location" INTEGER NOT NULL DEFAULT 0,
"origin_link" INTEGER NOT NULL DEFAULT 0,
"destination_link" INTEGER NOT NULL DEFAULT 0,
"num_links" INTEGER NOT NULL DEFAULT 0,
"departure_time" INTEGER NOT NULL DEFAULT 0,
"routed_time" INTEGER NOT NULL DEFAULT 0,
"travel_time" INTEGER NOT NULL DEFAULT 0,
"vehicle" INTEGER NULL,
CONSTRAINT "vehicle_fk"
FOREIGN KEY ("vehicle")
REFERENCES "Vehicle" ("vehicle_id")
DEFERRABLE INITIALLY DEFERRED)