At this time, we do not support conditional custom form questions, so we recommend setting up your form questions in the following way:
Question 1: Do you need transportation?
Yes, continue to next question
No
Question 2: (optional) If Yes, what type of transportation do you need?
Question 3: (optional) Where is your pick up location?
In the above case, we recommend requiring an answer for Question 1, but not for Questions 2 & 3.