"If/Then," a new musical at the National Theatre, follows the life choices and regrets of a fictional city planner in New York. But does it also say something about the choices that cities face?

In "If/Then," urban planning as a profession plays only a supporting role to Elizabeth (Idina Menzel), a planning Ph.D who returns to New York after a decade in Phoenix with her ex-husband. The plot bifurcates into parallel stories of Elizabeth's life as a single, career-driven city planner on a waterfront redevelopment project and an adjunct planning professor with a husband and two kids.

The problems Elizabeth face seems torn from the Breakfast Links: The city's deputy mayor is in charge of a large, politically contentious redevelopment project. Community groups and the city dispute the amount of affordable housing there should be. Housing advocates blog their frustrations.

Think of a play about planning, and you can already hear a chorus of opponents chanting on key, "We weren't consulted," and "Too tall, too dense, not enough parking!" The musical score focuses on Elizabeth's personal life (or lives), so if you were looking for a catchy tune on dedicated bus lanes or a ballad to nonconforming uses, you are out of luck.