I-4 at 557 Interchange

Consists of the reconstruction of the I-4 at SR 557 interchange from an existing partial cloverleaf interchange configuration to a diamond interchange. The intent of this project is to prepare the median along I-4 to accommodate the future multi-modal corridor with provisions for special purpose (express) lanes and a high speed rail (HSR) corridor. The improvements to the interchange at I-4 with SR 557, as well as the improvements to SR 557, shall meet the traffic capacity needs for the Design Year 2044 and improve safety. The current I-4 median width is insufficient to accommodate both the existing six travel lanes and the future multimodal corridor within the vicinity of the SR 557 interchange. As a result, this project will modify SR 557 and I-4 within the interchange area to be compatible with the I-4 Master Plan (Ultimate) Typical Section that includes six general purpose lanes, four express lanes and a High Speed Rail (HSR) corridor. This interchange improvement project realigns the existing eastbound and westbound general use travel lanes to the outside to coincide with the I-4 Ultimate alignment. The new realigned roadway consists of six 12-foot wide travel lanes, three eastbound and three westbound, with 12-foot wide (10-foot paved) inside and outside shoulders, separated by a 192’-6” wide depressed grassed median to accommodate the future express lanes and rail corridor, to be constructed by others. The minimum horizontal clear zone of 36-feet is provided. It is anticipated that the future express lanes will consist of two 12-foot wide travel lanes with 10-foot wide paved shoulders, in each direction, with a 2-foot wide concrete barrier wall from the general-use lanes, separated by the HSR corridor.

Division 01 -	General Requirements, Vehicular Access and Parking, Traffic Control, Temporary Barriers and Enclosures.
Division 32 -	Exterior Improvements, Flexible Paving, Asphalt Paving, Rigid Paving, Concrete Paving, Paving Specialties, Pavement Markings.
Division 33 -	Utilities, Storm Drainage Utilities, Storm Drainage Structures.