Protocol Department director-general Pakawat Tansakul said the rehearsal of transporting Asia-Pacific Economic Cooperation leaders will commence at 7pm on both days.
He said several roads and expressways will be closed during the rehearsals, but did not specify which ones exactly while mentioning general routes.
He added that the Foreign Ministry would like to apologise to the public for the inconvenience.
On Sunday, November 6, the rehearsal will start from Queen Sirikit National Convention Centre, with the motorcades driving to 20 hotels where Apec leaders will stay.
The motorcades will also be driven to Chakri Maha Prasat Throne Hall, the Royal Thai Navy auditorium and back to Queen Sirikit National Convention Centre.
On November 12, the rehearsal commences from the centre, with the motorcades heading to Don Mueang International Airport, the Don Mueang military airport and Suvarnabhumi Airport as well as to various hotels, before returning to the convention centre.