The road measures 10.76 miles long and would take a car obeying speed limits 18 minutes to travel its length.
The B489 is a B Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Wilstone Green, Tringford, Marsworth, Pitstone, Ivinghoe, Edlesborough, Eaton Bray, and DUNSTABLE.
The road passes through several counties, including Buckinghamshire, Hertfordshire, and Bedfordshire.