LOUISVILLE, Ky. (WDRB) -- Churchill Downs is ready for the 151st Kentucky Derby. 

The track changed the sign between the historic Twin Spires and the grandstand on Thursday from 150 to 151. It's a tradition that dates back to 1939. 

In February, Churchill Downs announced a four-year, $920 million project that will transform the grandstand and infield areas of the track. Those plans should be finished by 2028. 

CDI already has projects underway to add $90 million in upgrades before the 151st Kentucky Derby in May. The track has already made significant progress adding new premium seating in an area at the top of the stretch — also near the Kentucky Derby's starting position — that is currently made up of aluminum bleachers. Once the project is complete, there will be 8,300 "comfortable seating options," including covered and uncovered stadium-style seats as well as boxes along the rail.

Tickets for Kentucky Derby 151 are already on sale.  

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