Introduction to njtr1


njtr1 is a package that makes it easy to download New Jersey car crash data that is released by the New Jersey Department of Transportation. This package makes it easy to access detailed information on a statewide or county-by-county process that can assist those interested in studying trends in vehicle crashes in New Jersey.


The main function of this package is get_njtr1(). This function allows you to specify the specific table of NJTR-1 data that you'd like to query for a given year.

There are 5 different tables available with NJTR-1 data and published by the NJDOT. We will take a look at each of them in the following examples.


get_njtr1(year = 2019, type = "Accidents")


get_njtr1(year = 2019, type = "Drivers")


get_njtr1(year = 2019, type = "Vehicles")

Insurance company data

Each of the vehicle records contain a field name insurance_company_code that identifies the name of the insurance company that covers the vehicle involved in an accident.

This code can be used to join the vehicle data with a dataset containing details for every insurance company that does business in New Jersey.

Access the insurance from the package like so:


The insurance dataset contains a field ID_NO which is the same as insurance_company_code in the Vehicles table. This common field can be used for performing join operations.


get_njtr1(year = 2019, type = "Pedestrians")


get_njtr1(year = 2019, type = "Occupants")

Try the njtr1 package in your browser

Any scripts or data that you put into this service are public.

njtr1 documentation built on April 29, 2022, 1:06 a.m.