Excellent graphic showing property taxes, but that is not the whole story.
CapMetro collects a full penny sales tax (1 cent per dollar, $1 per $100 collected), so does the city of Austin, and the State of Texas collects 6.25 cents per dollar, or $6.25 per $100.
What people spend and have sales taxes on and what their property own is worth are two different things, but please do not suggest CapMetro tax revenues will be limited to just their property taxes collect.
I have no idea how the different taxes relate to each other, but the low figure shown in the graph - while accurate for property taxes - does not reflect total taxes collected to subsidize public transit and CapMetro.
Let's look at it from another point of view. The nominal household in Austin data from city data website:
http://www.city-data.com/city/Austin-Texas.html#b
Estimated median household income in 2017: $67,755
Assuming Uncle Sam collects 12% of that in income and social security taxes, that leaves $59,622 left after Federal taxes.
Let's assume the average household saves 3% for savings, that leaves 57,833 left for spending.
At 8.25% sales tax rate, the State, City, and CapMetro collects $4,771 in sales taxes per household, with CapMetro collecting $578.33 per household
Estimated median house or condo value in 2017: $332,700.
Proposition A would collect 0.0875 per $100 of that every year, totaling $274 per median household.
You can show in a graph that it is just a 4% increase in property taxes, but in reality it increase the taxes collect for CapMetro and transportation in general by a whooping 47%.
The math = (274 + 578)/578 = 1.474
Well, that scenario above does not include what the city was already spending on roads, so the 47% increase is not the whole truth.
If someone would be nice to find it and post it here, we can add that to this calculation. But somehow, we all know the total amount of money tax and spent for public transit is going to be far larger than the 4%.