“Something extreme?”

“It’s not something I can openly advise you to do.”

Aomame said nothing. She waited for more with narrowed eyes.

“Look over there. See that turnout just ahead?” he asked, pointing. “See? Near that Esso sign.”

Aomame strained to see through the windshield until she focused on a space to the left of the two-lane roadway where broken-down cars could pull off. The elevated roadway had no shoulder but instead had emergency turnouts at regular intervals. Aomame saw that the turnout was outfitted with a yellow emergency phone box for contacting the Metropolitan Expressway Public Corporation office. The turnout itself was empty at the moment. On top of a building beyond the oncoming lanes there was a big billboard advertising Esso gasoline with a smiling tiger holding a gas hose.

“To tell you the truth, there’s a stairway leading from the turnout down to street level. It’s for drivers who have to abandon their cars in a fire or earthquake and climb down to the street. Usually only maintenance workers use it. If you were to climb down that stairway, you’d be near a Tokyu Line station. From there, it’s nothing to Shibuya.”

“I had no idea these Metropolitan Expressways had emergency stairs,” Aomame said.

“Not many people do.”

“But wouldn’t I get in trouble using it without permission when there’s no real emergency?”

The driver paused a moment. Then he said, “I wonder. I don’t know all the rules of the Corporation, but you wouldn’t be hurting anybody. They’d probably look the other way, don’t you think? Anyway, they don’t have people watching every exit. The Metropolitan Expressway Public Corporation is famous for having a huge staff but nobody really doing any work.”

“What kind of stairway is it?”

“Hmm, kind of like a fire escape. You know, like the ones you see on the backs of old buildings. It’s not especially dangerous or anything. It’s maybe three stories high, and you just climb down. There’s a barrier at the opening, but it’s not very high. Anybody who wanted to could get over it easily.”