So in other words, you won't actually argue the merits of high-speed rail over filling in potholes.
If by "other words" you mean, "my silly strawman words," then yes. There are two levels of argument for high speed rail: 1) the broader economic issues of stimulus 2) the merits of rail vs. other stimulative efforts. I made a statement about 1, and people are upset I didn't discuss 2. You can ask me to discuss 2, but the fact that I didn't has no bearing on the argument for 1.
That being said, let's look at the benefits of high speed rail:
1) Safety.
2) Less polution.
3) Cost effective relative to our current transportation infrastructure (before you respond, make sure you're isolating the actual costs you want to compare):
But among the most annoying things about the discussion is the extent to which HSR is held to an entirely different standard than other investments.
Consider. What should America’s top transportation investment priority be at this stage? I don’t think it’s controversial to say that first on the list should be spending to bring existing infrastructure into good repair. But current spending is insufficient to maintain current levels of service, to say nothing of improvements up to acceptable standards, and current revenues are insufficient to fund current spending absent broad transfers from general funds at the local, state, and federal level. Now, if we are interested in economic efficiency, then we should want the beneficiaries of transportation investments to pay for the benefits they receive. And that means that revenue should be raised from increases in user fees. To raise enough revenue to cover necessary spending, gas taxes would need to rise at least 20 to 40 cents, and perhaps more. In much of the country, that moves the retail gas price to near $3.50.
Beyond paying for maintenance, we would want to ensure that existing roads and rails were being used efficiently before deciding to build more. And those caring about economic efficiency would insist that this be accomplished through road pricing. The added driving cost from congestion pricing would probably swamp that from increased fuel costs. I don’t know exactly what it would cost to drive from Washington to New York under a system that would keep that route congestion free 90% of the time, but I suspect it would be between $50 and $100, and potentially more (especially if one’s drive involved a trip into Manhattan). Costs would be significant in lots of places outside the Northeast Corridor. It wouldn’t be cheap to keep I-85/I-40 between Raleigh and Charlotte free of traffic 90% of the time.
http://www.ryanavent.com/blog/?p=2357
We don't require a return on our investment for roads from those that use it. If we did, gas prices would be significantly higher (or there would be more obnoxious toll roads). Yet we demand that high speed rail somehow cover the cost of its infrastructure investment.
To continue the list:
4) Quality and ease of travel. Please, let me hear you impassioned defense of air travel. At distances of less than 400 miles, rail delivers passengers between city centers at the same speed (probably faster when calculating security lines, and such) as air travel for a fraction of the price per traveler. You can move around, have plenty of space, can nap, can read, can work...etc.
6) All of the stimulative economic measures that go beyond pure helicopter dropping: i.e. quality jobs that last and important experience. Every dollar of money spent on rail projects delivers between $1.70 and $2.50 of economic benefit.
http://elpc.org/benefits-of-high-speed-rail
We subsidize every step of the car-centric travel system. Because our population is growing, we will be building new infrastructure. We can either build more car-centric infrastructure that is less efficient when all variables are factored in and the true cost is measured, and that's before dealing with the environmental impact (which is impossible to fully comprehend at this point). It's a better way to travel.