Make cambers more negative.
Most Japanese cars give 0° camber, which is no good imo.

increase speed.

especially doing > 100 in alphard... scary doh

Reduce speed

What vehicle was it ?

Yesterday an Alphard tailgated me at 110km/h after Menora tunnel downhill Ipoh bound.

Cilaka that fella, after i let him pass, he further accelerated & after 2 corners I can't see him d.

Siapa kata big box handling no good?

So for this Crosswind Assist feature to kick in, one has to drive even faster, so that the individual brakes would come on automatically. Why no just drive slower then ? Don't tell me that this Crosswind Assist when it functions at top speed, it will keep the vehicle in the same lane, correct ?

you encounter cross winds on daily basis?......

add all the bodykits for maximum aerodynamics and big spoiler for downforce 

tyre and rim stock and not overinflated?

1:15 ~1:48 s time stamp are important points to note.

Whether it's fast or slow, I presume it would be safe to assume that generally such truck driver would drive within the speed limit but even then, notice the report went on to say, drivers pulling over when they noticed the trailer started to sway etc. Once swaying fish tail or dog wagging its tail starts to happen it's very hard to recover from it. Actually it's all about forces. The moment crosswind force exceeds the downward force of a vehicle, that vehicle is a goner.

Even it was mentioned that the tow truck on rescue mission wouldn't do anything for the fallen over truck until to strong winds had died down. The risk increases trying to do stupid things.

Come to think of it, Crosswind Assist sounds very much like Lane Keep Assist.

Heavy items is a plus during crosswind but since you went on to say that swaying still happened to Myvi G3 with heavy load, those must be some pretty strong crosswinds.

fast or slow, surface area matter most in crosswind problems.

low level crosswind gonna push you off course.
if anyone remember force vector (i dont think this is the accurate use of it), add speed, just maybe, less veering off course.
or sell the myvi, get a Merc with crosswind stablization 

high level crosswind...
well, if it gonna flip is gonna flip.
unless you mod (reducing surface area) your car to slide the crosswind. 
but on a serious note, crosswind is no joke.
best solution, pick a route with no to little crosswind or wait for it to die.

Bro., you wrote the wind blew right and then blew left.
Could you explain in further detail what happened exactly ? Got video ?

Really interested to understand the situation you encountered.

Did you pump your tire or is your car loaded with people?

For me if I pump my tire before travelling i usually will feel more crosswind compare to didn't pump.

ktek able to solve the problem after added Ultra Racing bars? Or now no met same strong wind? (Relatively less strong wind since Friday)

well i do experienced crosswind before , all i did was slowing down for a while

The easiest way is to just open windows on both sides of the car 

The wind noise will be unbearable.. lol.. Unless he wear ear plugs 

Bro., you wrote the wind blew right and then blew left.
Could you explain in further detail what happened exactly ? Got video ?

Really interested to understand the situation you encountered.