HOW TO

Instructions provided shows how to create a time attribute for a network dataset when a MPH and Length field exist.

- Calculate the length of the street segments. Perform this one of two ways:
- Import the shapefile into a personal geodatabase.
- Create a new double field and use the Field Calculator.

- Create a new double field in the attribute table.
- Right-click the new field and select
**Calculate Values**. - Calculate the time using the following formula in the Field Calculator:

Note:In this example, the Length_field must be in units of miles for this formula to return the correct time values.

[Length_field] / [MPH_field] * 60

The time is provided in minutes using this formula. It is usually necessary to adjust for another value. For example, multiply by 60 again to receive the time in seconds.

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