The stop-request solenoid fired with a sharp electrical crack above Mac Cole’s sun visor.
Ding. Ding. Ding.
Three rapid rings cut through the heavy thrum of the Detroit Diesel engine. The pitch was 1,400 hertz, sharp enough to rattle a loose filling.
Directly above the windshield, the red incandescent lightbox flared to life. The stenciled letters glowed like fresh coals in the damp cabin air:
[STOP REQUESTED]
Mac Cole didn’t flinch. His boots remained flat on the worn rubber floor mats.
His right hand stayed locked at ten o’clock on the ribbed rubber steering wheel. His left forearm—a custom steel socket fitted with a heavy Globe five-hole brass transfer punch—pressed flat against the red lever of the Bendix air-brake valve.
Rule 9 was burned into Mac’s bones. While Coach #404 was in motion, the driver kept his right hand on the wheel and his left on the brake lever. If he lifted either arm, or turned his head past the yellow standee line while the wheels turned, the Municipal Charter voided on the spot.
