ORLANDO, Fla. — State transportation officials are warning that this week will be the most disruptive week for drivers since they broke ground on the I-4 Ultimate project in 2015.

 I-4 westbound has been reduced to a single lane between Par Street and Gore Street.

Drivers are urged to take Lee Road and travel south on either Orange Blossom Trail or John Young Parkway to get back to I-4 westbound. You can also take the toll roads State Road 417 or State Road 429 as alternates.

Map from FDOT shows the where the lane closures are, and the detours. (FDOT)  

This is all to accelerate construction work on the new I-4 west lanes through downtown Orlando.

These continuous lane closures will be in place until Monday morning.

FDOT also warns that they may have to close ALL I-4 westbound lanes this weekend.

That’s a big if  that depends on progress made and the weather.

If it does happen, you’ll take the Ivanhoe exit to get to Orange Avenue, turn right onto Colonial and then a left on Orange Blossom Trail to I-4 west.

Until Monday, the I-4 west exit to Anderson Street will be closed.

You’ll take that same detour from Ivanhoe Boulevard to Orange Avenue, to Colonial Drive and OBT to get to Anderson.

The South Street entrance ramp to I-4 west is also closed until Monday morning. Take Division Avenue to Kaley Street to get to I-4 west.

And the eastbound 408 ramps to I-4 east and west are also closing Sunday night into Monday morning.

FDOT says this is their final push to accelerate work while traffic volume is still down.

To see maps of all the detours and closures in the next week, head to the I-4 Ultimate website.