The search for a parking space on the streets of downtown Boston can warp a person’s world. Fire hydrants become symbols of thwarted hope. Other drivers become bitter enemies. Signs assume the properties of Talmudic texts, calling out for interpretation and bedeviling us with their complexity. As we drive in circles, sweating and honking hopelessly, our eyes dart around and the clock ticks. Happiness is the sight of red taillights coming on as someone prepares to leave; temptation is a taunting yellow placard offering garage space for $15 an hour.