HERE Routing API 7
In maintenance
Routing API v7 Developer's Guide

# Optimizing Matrix Calculation by Limiting a Search Range

In cases where only destinations in a specific range are relevant, you can optimize the matrix calculation by limiting the search range. To limit the search range, include a searchrange parameter with a desired value in the calculatematrix request. Calculation of routes to destinations which are beyond the specified range will be interrupted at certain point and the corresponding MatrixEntry elements in the response will include the Status field with a rangeExceeded value instead of Summary.

The following example demonstrates a request of a matrix of routes between two start points and two destinations with a search range limited to 5 kilometers. Both destinations are beyond the first start point range. Note that the corresponding matrix entries in the response include the Status field with a rangeExceeded value.

https://matrix.route.ls.hereapi.com/routing/7.2/calculatematrix.json
?apiKey={YOUR_API_KEY}
&start0=52.43,13.4
&start1=52.5,13.4
&destination0=52.5,13.43
&destination1=52.5,13.46
&mode=fastest;car;traffic:disabled
&searchrange=5000
Note: This example uses a HERE API Key to authenticate your request. For information on other possible options, see Authentication Guide. For examples of how to use the other authentication options with the Routing API v7, see Authentication Examples.

Response:

{
response: {
metaInfo: { /*content omitted*/ },
matrixEntry: [
{
startIndex: 0,
destinationIndex: 0,
status: "rangeExceeded"
},
{
startIndex: 0,
destinationIndex: 1,
status: "rangeExceeded"
},
{
startIndex: 1,
destinationIndex: 0,
summary: { costFactor: 1020 }
},
{
startIndex: 1,
destinationIndex: 1,
summary: { costFactor: 1314 }
}
]
}
}