Complex sentence: For example, when walking to catch a bus, the value of the one minute immediately before the bus has departed may be worth 30 minutes of time (the time saved not waiting for the next bus).
Split into simpler sentences: For example, when walking to catch a bus, arriving marginally after the bus has left may result in a relatively long wait. Here, the value of the one minute immediately before the bus has departed may be worth 30 minutes of time (the time saved not waiting for the next bus).