Autonomous vehicles, driverless cars: ask two people what they think, and it seems like you’ll get three opinions. Here are my reactions to four recent publications on the topic — keeping in mind that previous reports of distance’s death were an exaggeration. (As CBRE’s Revathi Greenwood notes, vehicle speeds won’t change, and so Marchetti’s Wall still remains. Even if the drudgework of driving is taken away, travel time still has a cost, and we’d rather be at our destinations already — e.g., “are we there yet?”)

WSJ (columnist Christopher Mims):

• AVs will be limited to small areas for the foreseeable future. “We’re likely to see vehicles that don’t require drivers but can only operate on a fixed, well-mapped route in cities with fair weather… the consensus of those I interviewed is that it will be many years before we get cars that can truly go anywhere.”
• Existing trials (Singapore, Pittsburgh, Babcock Ranch), which are limited to relatively small, intensively researched areas that are frequently remapped. Level 2/3 autonomy will remain limited to expressways, which have a protected ROW.
• Echoes some of Recode’s timeline (perhaps similar sources were interviewed).
• Takeaway: Autonomous shuttles will appear within campuses, urban districts, and planned communities, initially as “walk extenders.” “Robot valets” will enable more remote parking and reduced parking footprints. Freeway driving may shift to autonomy, but uptake is limited by consumer acceptance (see next).

Kelley Blue Book consumer survey:

• Americans are still broadly uncomfortable with the idea of Level 5 autonomy.
• Level 4 autonomy is most popular with current US consumers, who still want to be able to take the wheel. Level 3 seems less comfortable than Level 2.
• However, key early-adopter groups feel more comfortable with complete autonomy: luxury car buyers, consumers with experience with Level 2 AVs, and people used to the backseat: ride-hailing customers and teenagers.
• Takeaway: The transition to AVs is dependent upon social acceptance, and currently many Americans want to maintain the status quo. The transition might take a while (more Americans will have to try AVs), but may be steep once it happens.

Rocky Mountain Institute forecast:

• Mobility services in major US metros are a potential $120 billion annual market by 2025, including $60 billion just in large Sunbelt metros.
• Because AV and EV technologies reduce operating costs and increase capital costs, they will find broad acceptance in high-utilization fleets first, where their low costs will subvert the individual-car-ownership paradigm. (2017’s EVs will be cheaper for fleets than gas cars.)
• AVs will cut the cost of rides by 60% to be cost-competitive with car ownership by 2018, with another 60% decline in costs as economies of scale are realized. The switch from personal cars to AV fleets will occur between 2020-2025, with long-term demand for cars falling to ~6 million.
• Lower mobility costs will result in a $1 trillion annual consumer surplus to be spent on other sectors. (Keep in mind that spending on autos has a low multiplier effect.)
• Even if VMT doubles and more power plants are built, these two technologies will result in sharply lower CO2 emissions (nearly -1 GT CO2E by 2040 = ~13% cut in today’s emissions).
• Takeaway: Parking demand may sharply decline, but what parking is left will need significant EV infrastructure. Loading/valet zones will quickly need to be implemented. Consumer spending on cars could be pivoted to other spending, like higher-quality real estate.

City Observatory (Joe Cortright) [part 1] [part 2]:

• RMI’s cost estimates of <$0.50/mile are roughly in line with other published estimates, with lower costs associated with smaller/lighter vehicles. This is lower than the per-mile cost of not just driving, but even short transit trips.
• However, $0.50/mile is much higher than the perceived $0.15-$0.20/mile marginal cost that most Americans assume for private-auto trips. (Most Americans only consider the cost of gas when driving; costs such as depreciation/wear, insurance, repairs, monthly parking, and wasted time are all considered sunk.)
• “Pay by the slice” mobility, like car-sharing, tends to encourage shorter trips. Pricing will probably be more, not less complex, with various “surge” surcharges that use information to optimize the balance between travel demand and supply.
• Rush-hour capacity will still be an issue, especially in high-density downtowns. Rail transit, walking, and cycling will still move more people in less space.
• Takeaway: Mobility won’t be “too cheap to meter,” as optimists once said of nuclear electricity. As such, central locations will still matter, even if price differentials flatten somewhat. (TNCs are already “filling in the lines” between transit corridors and increasing the value of secondary urban locations.) Whether dense downtowns built around rail/walking remain useful is an open question.

What everyone agrees upon is that this is the first huge shift in metropolitan mobility since the 1940s-1980s shift towards mass car ownership. It’s important to remember that American suburbia is a political and social construct, not a fact of life, and that policies put into place immense structural supports for American suburbs.