Traffic Jam Assist

[Vwjap]

is it possible to have TJA retrofitted on a MY19?

I picked mine up Saturday, it was a bit of an impulse buy (I was planning on waiting another 6-12mo) but given the 10% brexit increase and the current deals from VW I had my arm twisted whilst my Polo BlueGT was in for its MOT!

This is for Audi but it has been done in a golf.

https://www.ascoding.ch/en/activate-traffic-jam-assist-tja/

ive been told that’s been around a while and doesn’t work

[Sootchucker]

Well my May 2018 GTI was specced with:

Lane Assist Plus with Dynamic Light Assist, Emergency Assist, Rear Traffic Alert, Side Scan, Traffic Jam Assist and Traffic Sign Recognition

Which apparently consists of:

Lane Assist, camera controlled warning system should the vehicle drift out of its lane.

Dynamic Light Assist, automatic sensors detect other road users and cover part of
the headlights appropriately. If dazzling other road users cannot be prevented, the
light distribution is automatically set to dipped beam headlights.

Emergency Assist, driver intervention should sensors detect the driver is incapable of
driving. Automatic hazard light activation while bringing the vehicle to a controlled
stop within its lane

Rear Traffic Alert, monitors the area behind the vehicle during reversing manoeuvres,
if another vehicle is getting too close the system alerts the driver by means of an
audible and visual warning or brake intervention where a collision is imminent.

Side scan, radar sensor controlled warning system for lane changing and blind spots
with visual warning via light in door mirror housing.

Traffic Jam Assist, camera and radar sensor controlled warning system to accelerate,
brake and steer should the vehicle drift out of its lane, providing the driver’s hands
are on the wheel.

Traffic Sign Recognition, camera controlled system with visual warning for traffic
and road signs.

But despite that, I've never been able to work out how traffic assist works (or is even installed) !

[fredgroves]

Sooty:

Traffic Jam Assist function

At speeds under 60 km/h (35 mph) Traffic Jam Assist can maintain a time interval, set by the driver, to a vehicle in front, and help the vehicle to stay in lane ⇒ .

The system automatically controls acceleration, braking, steering and, if required, will decelerate to a stop behind a vehicle that is stopping, and then drive away again automatically.

Only use Traffic Jam Assist on motorways and well-maintained country roads. Do not use Traffic Jam Assist in urban traffic.

Switching Traffic Jam Assist on and off

Traffic Jam Assist together with the adaptive lane guidance ⇒ Lane keeping system (Lane Assist)  is switched on and off via the Infotainment system ⇒ Operation and display in Infotainment system .

Traffic Jam Assist can also be switched off together with the lane keeping system by pressing the button for driver assist systems ⇒ Button for driver assist systems .

Technical requirements for using Traffic Jam Assist

    The lane keeping system is switched on and active together with the adaptive lane guidance ⇒ Lane keeping system (Lane Assist) .

    Adaptive Cruise Control (ACC) is switched on and active ⇒ Adaptive Cruise Control .

    The selector lever is in position D/S or in the Tiptronic gate.

    The system has detected a lane marking on both the right and left sides of the vehicle ⇒ Fig. 134 .

    The speed is under 60 km/h (35 mph).

Traffic Jam Assist is not active (the indicator lamp for the lane keeping system lights up yellow)

    As soon as one of the conditions indicated on ⇒ Technical requirements for using Traffic Jam Assist  is no longer fulfilled.

    If one of the conditions for the proper functioning of the lane keeping system is no longer fulfilled ⇒ Lane keeping system (Lane Assist) .

    If one of the conditions for the Adaptive Cruise Control (ACC) is no longer fulfilled ⇒ Adaptive Cruise Control .

Switch off Traffic Jam Assist in the following situations

Traffic Jam Assist should always be switched off in the following situations due to system limitations:

    When a high level of concentration is required by the driver.

    Very sporty driving.

    In poor weather conditions, e.g. snow or heavy rain.

    Poor road conditions.

    Driving through road works. (hmmm where will most jams occur VW!?)

    In urban areas.

[Vwjap]

Fred I think you’ll find it’s more to do with the lines not to good in roadworks

[fredgroves]

Fred I think you’ll find it’s more to do with the lines not to good in roadworks

Yes, I know...

The ACC bit of the manual says don't use it in roadworks too

[Mutley75]

I was all excited reading the spec sheet and the abilities of ACC before delivery. In the real world most of this stuff is just a pain in the a$$. I almost had a collision trying to fathom out how to switch on ACC and taking my eyes off the road trying to work out which buttons to press. Once it was finally on, I decided after about 3 minutes I hated the juddery way that it reduces speed to match the traffic in front and switched it off again.

When driving manually I anticipate the road ahead and just lift off the throttle. I rarely need to use my brakes during normal A/B road driving. I’m not sure if it applies the brakes or slows by changing gear? Doesn’t feel particularly smooth and I imagine I’d look like one of those old fools who dab the brake pedal every 13 seconds from the car behind. Anyway, switched it off and haven’t used it since.

Dynamic Headlights however - worth every single penny. Had High Beam Assist on the Audi but this is a whole new level.

[fredgroves]

I love ACC!

Wouldn't be without it... no idea why you say its juddery? But then again I have a manual gearbox.

Easy to switch on, easy to adjust, works really well and reduces stress for me loads. One of the best things on the Mk7 for me!

[Mutley75]

Cruise Control on a manual is even more pointless! 

[Mutley75]

I love ACC!

Wouldn't be without it... no idea why you say its juddery? But then again I have a manual gearbox.

Easy to switch on, easy to adjust, works really well and reduces stress for me loads. One of the best things on the Mk7 for me!

When doing say 50mph and the car in front brakes, there’s a sensation similar to (but not as noticeable as) when ABS kicks in. It feels like it’s dabbing the brakes rapidly and gently to slow down. Maybe because it’s automated rather than me doing it, but it’s not as smooth as my driving. I didn’t like it.

[fredgroves]

Cruise Control on a manual is even more pointless! 

Absolutely not. Works just lovely on all of those motorway miles I do.... then again I have a GTD and its happy to pick up from 30mph in 6th gear.