How Can I Join a Vanpool? You are here: Home / Vanpool / How Can I Join a Vanpool? If you are interested in participating in a vanpool or if you have questions regarding this program please contact an authorized vanpool leasing company. These companies include the following: Enterprise Rideshare (800-826-4967) CalVans (866-655-5444) vRide (800-826-7433) Questions? Call Valleyrides.com staff at (559) 441-7433 or email Suzanne Martinez at email@example.com.