Yes, it's information technology that offers the biggest potential through more efficient use of resources, whatever they are.
Another approach is putting the kinetic energy in to conduits and doing away with the (unitary) vehicles, or trams & trains as we know them. An awkward intro to posing the question what criteria makes mass transport more appealing to personal transport? You'd have to forget personal space and concentrate on speed & cost, but there must be a reasonably predictable relationship between passenger numbers and density of departure & destination points.
How frequent do services need to be for passengers not to bother with consulting a timetable? If you can master that you'll have taken a big chunk out of the personal transport advantage.
Brits like the concept of being "world beating" you'd think mastering both would be right up our street - just like trying to forecast the weather with masses of constantly changing variables.
I've had a home office / workshop from which I have run my businesses from since the early 80's and as far as offices go, I have never been able to work out or understand why people have ever needed remote offices, that is one where they need to leave home and drive 30 minutes to an hour to or similar in a bus or train. With the uptake and prevalence of the internet and personal computers, even more so. The pandemic we are presently in has (finally) shown this to be quite viable. I totally get that from time to time, face to face meetings are needed for which, then one does need to get out for.
So, have 80%+ of office workers work from home and bam, there's 50% of the traffic in peak times, gone. There's also been an encouragement to stagger peoples starting and work times here in recent years. It's had a very small uptake, but has made a fairly sizable impact.
Where it comes to workshops and site work, yes, I get that few can do that from home and not everyone wants that in any case.
We can't even run driverless trains ....
DLR?
Would we really want to? 1 driver to even a few dozen passengers doesn't seem a prohibitive cost for a bit of added safety & insurance against a HAL 9000 situation 
We can't all be personal shoppers, or dog walkers, when technology has taken over all the real jobs.
In quite recent years, we've had a few light rail system built around Sydney and there's more presently under construction. While I don't agree with it on moral and safety grounds, these are driverless. Some of these have been running around 3 or 4 years now and so far, as best I am aware, there's actually been no issues on a safety front with them. There's one I use a few times a year that takes me about 1/2 way to the airport (the other 1/2 is a conventional drivered train). The first couple of times, it was a novel experience, the acceleration rates I think for the mix of general public who use them is quite high (I'm surprised there's been no complaints) though that would be adjustable. These run as a 4 to 6 car train (maybe more in peak times ?), and there's not doors or dividers between carriages. I don't know if this is common anywhere else, but I gotta admit, I find it highly amusing, to the point where I nearly always board in either the front or rear so I can look the few hundred metres down it's length as it snakes it's way through, under and over suburbia.
While successful, I would like to see driver's on these trains.
Getting well off topic here, I've felt for a very long time that there should be a moral cause for business and government departments to employ people. This idea of slimming and lean workforces is only choking itself. I also find it almost perverse that many big businesses locate one of their centres in to areas where land is cheap, set up shop, take from all the local resources, often bringing many and varied issues with them, employ very few and give little back to the community where they are sited, sending all financial profits elsewhere. I feel there's a moral obligation for these businesses to give back to the communities where they are and at the very least, one small way they can do this is to employ locals and in numbers above the blood from stone, high tech levels that they are all too often at.
