More people passed and stepped onto the nearest strip. The moving gray bands stretched endlessly to either side of her, carrying their human cargo through the City. The strip closest to her was moving at a bit over three kilometers an hour; most of its passengers at the moment were elderly people or small children practicing a few dance steps where there was space. Next to it, another strip moved at over five kilometers an hour; in the distance, on the fastest strip, the passengers were a multicolored blur. All the strips carried a steady stream of people, but the evening rush hour would not start for a couple of hours. The boys had challenged her during a slower period, which meant they weren’t that sure of themselves; they would not risk a run through mobs of commuters.

“Let’s go,” Amy said. She stepped on the strip; the boys got on behind her. Ahead, people were stepping to the adjoining strip, slowly making their way toward the fastest-moving strip that ran alongside the localway platform. Advertisements flashed around her through the even, phosphorescent light, offering clothing, the latest book-films, exotic beverages, and yet another hyperwave drama about a Spacer’s adventures on Earth. Above her, light-worms and bright arrows gleamed steadily with directions for the City’s millions: THIS WAY TO JERSEY SECTIONS; FOLLOW ARROW TO LONG ISLAND. The noise was constant. Voices rose and fell around her as the strip hummed softly under her feet; she could dimly hear the whistle of the localway.

Amy walked up the strip, darted past a knot of people, then crossed to the next strip, bending her knees slightly to allow for the increase in speed. She did not look back, knowing the boys were still behind her. She took a breath, quickly stepped to the next strip, ran along it toward the passengers up ahead, and then jumped to the fourth strip. She pivoted, jumped to the third strip again, then rapidly crossed three strips in succession.