The corridor query tab retrieves collision data within a user specified corridor. This allows the selection of midblock collisions. The user specifies the desired street for analysis and the start/end intersections. In the example below, the corridor is Hollywood Blvd and the start and end intersections are Argyle Ave and Cherokee Ave.
There is an option to include or exclude intersection related collisions for the start/end intersections and intermediate intersections on the corridor.
If the intersection related collisions are excluded, the user has the ability to specify a distance from intersection that should be excluded. For example, you could choose to not include any collisions within 50 feet of an intersection. The default value of 0 means if the intersection related field designates the value as 'No' it will be included in the query regardless of the distance from intersection.
As with the other query options, the query respects the timeframe and other filters that were selected. Refer to building a query help file for additional information.
In a small number of cases after selecting a corridor, the route will divert onto other streets. A new option is now available to add calibration points to a chosen corridor to ensure all of the corridor is properly selected. For example, in Los Angeles if you select Sunset Blvd from Pacific Coast Highway to Ladera Dr, the corridor gets diverted along Wilshire Blvd:
To correct the corridor path you need to add calibration points near the intersection of Sunset Blvd with Pacific Coast Hwy. You can do this simply by clicking on the map at points along Sunset Blvd. It will add the black cross mark each time you click a point. In this case, the route simply needed an additional calibration point between Marquez Ave and Livorno Dr close to the starting intersection at Pacific Coast Hwy:
It may take multiple attempts to add calibration points, but portions of roadway with extensive curvatures or near trails or parallel side streets are likely candidates for extra calibration points. After you have added the calibration points, click the Recalculate Route button below the map. The new route for the corridor will be shown with the additional calibration points:
The corridor now properly follows Sunset Blvd and will ensure all the collisions on the corridor are queried. If the results are not as expected, you can click on the map again to add new calibration points.