BennoB66

Does this work at all speeds or only above a certain speed? I am finding it does nothing for me unless I seem to be on a freeway going over about 50 mph.

Lexus376

Seems to be a very limited feature.
The manual says: (boldface mine)
Lane centering function This function operates when all of the following conditions are met.
• LTA is turned on.
• Setting for “Steering Assist” and “Lane Center” in of the multi-information display are set to “On”. (P.78)
• This function recognizes white (yellow) lane lines or the position of a preceding vehicle (except when the preceding vehicle is small, such as a motorcycle).
• The dynamic radar cruise control with full-speed range is operating in vehicleto-vehicle distance control mode.
• Width of traffic lane is approximately 10 to 13 ft. (3 to 4 m).
• Turn signal lever is not operated.
• Vehicle is not being driven around a sharp curve.
• No system malfunctions are detected. (P.190)
• Vehicle does not accelerate or decelerate by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for changing lanes.
• ABS, VSC, TRAC and PCS are not operating.
• TRAC or VSC is not turned off.
• Hands off steering wheel warning is not displayed. (P.189)
• The vehicle is being driven in the center of a lane.
• Steering assist function is not operating.
https://drivers.lexus.com/t3Portal/d...f/OM06194U.pdf page 189

Kijug

I have a 2014 ES but was given a 2019 loaner during 90K maintenance last month. I found the lane following to work rather well. You have to have Dynamic Cruise Control turned on and have your hands on the wheel (or finger!). I was going 50-70 MPH and the car was following the white lines well on the highway.

A3A

Right it’s only active with dynamic cruise on. With dynamic cruise off only lane keep assist/warning are on and only above a certain speed.