Section B, also known as the Wekiva Parkway, would connect SR 429 from US 441 to I-4 in Sanford. This section of roadway is still currently under construction. It has been under debate for over a decade, due to its planned alignment being complicated by the ecologically fragile Wekiva River basin and shifty support from Lake County. In 2004, an agreement was reached for its completion. It will be built largely as a long causeway with a limited number of exits to better control development in the region. It is now planned to link SR 429 with SR 417, creating a continuous beltway north of Orlando; however, older plans involved a short drive on I-4 or its collector/distributor roads to reach SR 417. On May 25, 2011, the Florida Department of Transportation and CFX announced that they have partnered to jointly explore the construction of the Wekiva Parkway extension. The proposed route will extend through Orange, Lake, and Seminole Counties and is estimated to cost $1.8 billion. Officials hope to break ground in 2012, with completion by 2021. On January 20, 2016, the first stub section from CR 435 (Mount Plymouth Road) near Haas Road in Orange County to SR 46 east of Camp Challenge Road in Lake County opened to traffic and it is the first all-electronic toll road in Central Florida. On July 27, 2017, the Wekiva Parkway's mainline was extended from the US 441 connector road to a new northern terminus at Kelly Park Road. On March 31, 2018, the Wekiva Parkway's mainline was extended from Kelly Park Road to a new northern terminus at SR 46. Along with this, a spur known as SR 453 connecting the Wekiva Parkway with SR 46 near Sorrento was opened in conjunction with the extension. This was the final section of the CFX's Section 2 of the road, and the final section of the CFX's section altogether. The final section of the Wekiva Parkway between SR 46 and I-4 is under construction and is planned to open in 2023. This section will be constructed and maintained by FDOT. On May 16, 2022, a section of the Wekiva Parkway between SR 46 near Mount Plymouth to SR 46 just west of Longwood Markham Road in Seminole County opened to traffic. This was the longest section of FDOT's section of the highway to open and includes several wildlife crossing bridges. On August