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This is going to be some rough calculations, as it's more of a thought experiment than an in depth look at the exact numbers it a tenth of a percentage point, but it will be correct enough to get an idea. So here we go......
According to the Bureau of Transportation Statistics the following are the number of vehicles registered in the US over the last 5 years they have published (this will include freight vehicles such as cargo vans and semis, so yah...).
2012 - 253,639,386
2013 - 255,876,822
2014 - 260,350,938
2015 - 263,610,219
2016 - 268,799,083
Now, using these numbers we can see that over a 5 year span there is an AVERAGE of 3,789,924 more vehicles on the road every year. For the purpose of this, I will jump ahead to the very beginning of 2019. Which makes for a grand total of.... 276,378,931. So, that's where we start off.
Now, how many new vehicles are sold every year? Well... Thats actually an annoying one to find it seems. But thankfully, after much searching, I have found some graph that doesn't involve a shitload of number crunching! So I will use the same set of sales years for this. Meaning, 2011 to 2015.
2011 - 12,778,885
2012 - 14,492,398
2013 - 15,582,136
2014 - 16,531,070
2015 - 17,470,659
So, now we have an average of 15,371,030 new vehicles each year. Using this point of data, we can get the final important piece of information; the number of vehicles removed from the total every year. Using the averages, we come to a total of 11,581,106.
And here we go. If we just use averages, we can get an idea on the total amount of vehicles on the road every year, and extend that out till we get to the date point we want. (I will just use the averages from these years to keep my brain from melting completely, don't hurt me!) I am also crazy tired, so I will keep this simple for my own sake. Assuming all vehicles starting on 1/1/2019 are gas, and all new vehicles sold are electric, the table goes as (Total gas vehicles of previous year - vehicles lost)/New All Electric Sales.
2019 - 276,378,931/0
2020 - 264,797,825/15,371,030
2021 - 253,216,719/30,742,060
2022 - 241,635,613/46,113,090
2023 - 230,054,507/61,484,120
2024 - 218,473,401/76,855,150
2025 - 206,892,295/92,226,180
2026 - 195,311,189/107,597,210
2027 - 183,730,083/122,968,240
2028 - 172,148,977/138,339,270
2029 - 160,567,871/153,710,300
2030 - 148,986,871/169,081,603
Going by this (god awfully simplified structure) it would take until sometime in 2029 for electric vehicles to finally overtake gas powered vehicles. And that is under the absolute, remarkably best circumstances I could give electric vehicles, meaning a statistical impossibility. You would need about another 13 years before gas vehicles were entirely phased out. A grand total of 23 years for complete elimination, well over her talking point of 12 years.
Now, there are several other factors which seriously complicate the math. Electric sales in the US only account for 240,380 in 2018. While a 130% increase over 2017, thats still a dismal 1.56% of new car sales (give or take a few tenths, I'm fucking tired). So in all reality, the chart should actually look something like this....
(previous years total vehicles - vehicle loss) + (new vehicles - last years total electric vehicle sales * 1.56) : Last years total electric vehicles * 1.56)
.....I think.
And that still isn't accounting for people who will cling to older gas vehicles for any number of reasons, electric vehicles being part of the total vehicle loss from the previous year, economic downswings which bolster used vehicle sales while depressing new (used vehicles sales in 2017 were around 39 million), and god only knows how many other factors. All said and done, having all electric vehicles in the next 20 years is nothing short of a pipe dream barring serious government intervention.
Now, if someone wants to dig into the numbers and do some real crunching, I will supply the links that I used to get this all done. And again, math is not my strong suite so feel free to correct me if I screwed this up somewhere (which I am sure I did at some point. Bleh.)
But regardless, hope this sates your curiosity a wee bit @panamaican as I did the best I could after a 16 hour work day. And now I am off to fucking bed.
Links of shit:
total vehicles - https://www.bts.gov/content/number-us-aircraft-vehicles-vessels-and-other-conveyances
new vehicle sales - http://www.goodcarbadcar.net/2012/10/usa-auto-industry-total-sales-figures/
used vehicle sales - https://www.edmunds.com/about/press...ording-to-latest-edmunds-used-car-report.html
electric sales 2018 - https://cleantechnica.com/2019/01/0...-210-in-q4-2018-us-electric-car-sales-report/
Solid work effort on this one. Bravo!
