Officers believe that George, 77, from Harrogate, boarded a bus bound for Leeds at around 12 pm on Wednesday 2 March 2016, the day he was reported missing.
As well as searching the Harrogate area, officers are also focusing their enquiries in the Leeds area and with the bus network.
Officers have reiterated their appeal to anyone travelling on public transport in the Harrogate and Leeds area to contact them if they have seen George or know of his current whereabouts.
Better still, if George sees or hears this appeal, please get in touch with your family or the police and let us know that you are safe. If you pefer, you can call the missing people charity 116 000 in confidence.
George is described as white, 5ft 4in tall with grey receding hair, brown eyes and a pale complexion. He was last seen wearing a grey waterproof jacket with a blue fleece underneath, brown trousers, a dark blue hat, dark blue gloves and black shoes.
Anyone with any information is urged to contact North Yorkshire Police on 101, select option 1 and pass information to the Force Control Room.