What is CicLAvia?

That's hardly a simple question these days. The Los Angeles open-streets festival, which may gain a monthly spot on the calendar by 2017, isn't just drawing increasingly large crowds and expanding into new territory, including upcoming routes in South Los Angeles and the San Fernando Valley.

CicLAvia is also a Rorschach test, a civic pop quiz that provokes extreme — and telling — reactions.

For cyclists, it offers a chance to ride on streets emptied of car traffic, of course, but also an encouraging sign of growing clout in a city long designed around the automobile.

For pedestrians, who have been pushing for an expansion of bike-free spaces in each CicLAvia, the events have been nearly as liberating.

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And for drivers? For some, CicLAvia is one more annoyance, one more obstacle in a region where traffic is already punishing enough. Holding it more often is hardly on their civic wish list.

But to define people solely by mode of transportation — to say that they belong to one and only one of these various camps — is to risk missing what might be CicLAvia's most valuable contribution.

Drivers, when they are not behind the wheel, are also pedestrians. Most cyclists also drive cars. The vast majority of pedestrians know what it's like, as drivers, to feel the soul-crushing frustration of horrible traffic.

CicLAvia's real importance has been to make clear that the divisions that we spend so much time debating — between cyclist and driver, driver and pedestrian, pedestrian and cyclist — are surprisingly malleable.

CicLAvia hasn't only allowed Angelenos to see the city and its architecture with fresh eyes. It has allowed us to see ourselves with fresh eyes.

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Drivers who ride bikes along the CicLAvia routes gain a new understanding of how their cars, hulking and hugely powerful, must look to cyclists. Pedestrians who turn cyclist for the day learn both how oblivious those on foot can be but also what it means to be in a position where their own carelessness can seriously injure somebody else.

And the cyclists, finally, who grumble about having to walk their bikes through CicLAvia's ever-expanding pedestrian-only zones, are forced to consider how banning cars and giving bikes extra space on the street sometimes unleashes in them the same recklessness they complain about in motorists.

It's hardly a surprise that CicLAvia — or the expansion of bike lanes around Southern California, for that matter — raises the hackles of some drivers. For more than half a century the very design of the city has supported and emphasized the idea that the roads belong to them and that anybody not using a car is an interloper at best and a threat (to their rights, freedom of movement, even happiness) at worst.

This familiar attitude suggests that every change to the city, whether it's new architecture or new transit lines, should be weighed primarily, if not exclusively, by its impact on motorists and levels of car traffic. It has seeped so deeply into the civic consciousness that it has fundamentally skewed debate on a wide range of crucial issues.

Even former Mayor Antonio Villaraigosa, who gave CicLAvia important early support, pushed for a plan to turn both Olympic and Pico boulevards into one-way streets, a shift that would have expanded traffic lanes at the expense of literal and symbolic space for pedestrians and cyclists.

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More recently a pessimistic report about the city from the high-powered L.A. 2020 Commission — "A Time for Truth" was its take-your-cod-liver-oil title — declared in its opening pages that Los Angeles is "strangled by traffic." OK, no real debate there, except maybe with the choice of metaphor.

But when the report later turned to a discussion of mass-transit in Los Angeles, it was still concerned entirely with the rights and privileges of drivers.