Hackney Carriage and Private Hire Knowledge test


As part of an application for a Private Hire/Hackney Carriage Driver’s Licence candidates are required to pass a written test, covering locations of well-known destinations, routes, the Highway Code and our licence conditions/byelaws.

Please download and read our Knowledge Test guide (pdf).

  • The knowledge test starts at 11am and will last 1 hour.
  • The knowledge test is at: Three Rivers District Council Offices, Northway, Rickmansworth, WD3 1RL

All applicants taking a test must arrive at least 15 mins before the test is due to start and sign in at our reception desk. Anyone arriving after this time will be turned away and require to rebook for another day. No exceptions can be made as there are strict timing limits we need to adhere to.

There is a car park situated directly outside our offices, as well as on Northway. Please note that the car parks are pay and display.

The cost of the first knowledge test is included in the initial application fee.  If an applicant fails their first attempt they may retake a test at a cost of £15 per test, applicants may take up to 3 knowledge tests.   This fee must be paid at reception/One Stop Shop on the day of the test and retain the receipt to show the Licensing Officer.

If an applicant fails all three attempts then they will not be able to continue with their application, it will be returned to them and a refund offered. Anyone wishing to reapply after this must wait a period of 6 months following the final test before re-applying.

Please ring Customer Services on 01923 7766111 in the event of cancellations or rebooking. Should you wish to change the date nearer the time, you must contact the licensing department at least 24 hrs prior to the test. If an applicant fails to attend on the day of their test without contacting us then the full £15 test fee will be payable.