It was on the motorway close to Phoenix, Arizona, that I understood completely driverless vehicles may be a serious far off dream. Also, that was on the grounds that our Google Waymo robo-taxi appeared to be unequipped for leaving that motorway.
We were in Arizona to record a radio narrative for the BBC World Assistance about the advancement towards making independent vehicles that would make our streets more secure and supplant human drivers with robots.
Google drives this race right now and for the beyond a half year has been offering a robo-taxi administration, Waymo One, to a chosen handful early adopters in and around the Phoenix suburb of Chandler.
Our first ride with Waymo took us through the calm rural roads, where traffic is inadequate and drivers polite.
Here, the minivan, fitted out with a battery of sensors and superior quality cameras, performed astonishingly, taking care of somewhat precarious left turns, spotting other street clients and dialing back as it passed a school.
While a Google engineer sat in the driver's seat, she never mediated and soon we loose and failed to remember that we were viably being driven by a robot.
Then, at that point, we hitched a ride with Shawn Metz, one of a couple hundred local people chose as clients of Waymo One.
He let us know he and his significant other utilized the help for their week by week shop, evenings out and in places with restricted stopping.
"We're expecting to go from a two-vehicle to a one-vehicle family at last and hopeful this innovation may get us there," he said.
Yet, as we headed along the motorway on the 20-minute ride to his office, things started to turn out badly.
As we moved toward our exit, there was a strong line of traffic to one side.
A confident human driver would most likely have crushed over and come to the leave path - yet the robot, which can't surpass as far as possible, was more mindful.
The vehicle missed that exit and the following one preceding at last leaving the motorway.
Furthermore, when we were back on the rural roads, it seemed to freeze at an intersection where it expected to go left across traffic - sooner or later, the specialist in the driver's seat needed to dominate and finish the turn.
Mr Metz let us know that as far as he can tell this was an exceptionally uncommon event.
All things considered, it filled in as a representation that the Waymo independent driving innovation, generally thought to be in front of its rivals, actually should be refined.
It is reasonable, nonetheless, that the framework is customized to be super wary.
All things considered, only a couple of miles away, another self-driving vehicle killed a passerby in a mishap in Walk 2018, which shook trust in independent innovation.
The vehicle had a place with Uber, one of Waymo's large adversaries, and it blasted through a lady pushing a bicycle across a street close to Arizona State College.
An examination tracked down that the security driver had been watching a video on her telephone right now of effect.
The ideal street and climate conditions combined with inviting neighborhood authorities have made the Phoenix region one of the world's driving areas for testing independent vehicles.
From the beginning, there was little resistance however neighborhood columnist Ryan Randazzo said the mishap had shaken public certainty.
"To have a mishap that was the specific sort of thing that these vehicles should have the option to forestall truly shook individuals' nerves," he said.
"What's more, I surely hear significantly additional criticism from individuals in this space who are not happy with these tests going on locally."
Clem Wright, item chief at Waymo, conceded the Uber mishap had gotten back how high the stakes were in the competition to fabricate self-driving vehicles however focused on his organization was being careful in its testing.
"We have 10 million miles on open streets, assembling these various situations," he said.
"And afterward we likewise use reenactment where we say, 'Hello, here's a precarious circumstance. Imagine a scenario in which this vehicle is coming 10 miles each hour quicker. Imagine a scenario in which a bike is steering into us.'"
In any case, with enormous totals being contributed by both innovation organizations, for example, Google and conventional vehicle creators, there are some valiant expectations of when the robots will actually want to take to the street without a human security driver.
Ken Washington, Passage's central innovation official, let us know his organization's broad independent driving system would convey brings about a few years.
He said: "Among now and 2021, we will apply that learning in a way that permits us to ultimately remove that security driver from the framework on chose courses."
In the UK, the Chancellor, Philip Hammond, has likewise guaranteed that "certifiable driverless vehicles" will be on the streets by 2021.
Waymo has as of now got authorization to work without a driver in a restricted region close to Google's Mountain View central command, in California.
Yet, any tests with completely independent vehicles are probably going to occur under rigorously controlled conditions for quite a long time to come.
Myra Blanco, a specialist at the Virginia Tech Transport Foundation, in the US, said we would most likely see driverless vehicles in geo-fenced regions in two to five years however she was undeniably more incredulous with regards to full mechanization.
"That implies going from the mountains, rustic streets, right to the city - that will take somewhat more, presumably conceivably years and years away," she said.
That being said, there will be genuine issues in blending the robots, the human drivers and people on foot on similar roads.
A long way from the methodical streets of Arizona, I remained with the vehicle essayist Christian Wolmar at the furious intersection outside Holborn Cylinder station, in focal London.
He brought up that people on foot would have no faltering in venturing out before driverless vehicles, realizing they were modified to stop, and the outcome would be gridlock.
"When you set the standard that driverless vehicles need to adequately grovel to any common in the road, and walkers start to discover that, then, at that point, the entire overall influence in our roads will transform," he said.
"The idea simply doesn't endure blended use roads."
The robots are going to our streets yet they are as yet apprehensive new drivers with a long way to go.
For every one of the admonitions that large number of driving positions could be computerized out of presence, it looks like people will remain in the driver's seat for quite a long time to come.