Lyft’s vehicle fleet will remain largely commandeered by drivers even as the company continues to develop its autonomous driving capabilities, co-founder and president John Zimmer told CNBC’s Jim Cramer on Tuesday.

“What we see happening is that there will be a hybrid network, meaning on day 1, just like what happened with phones, you didn’t have 3G go to 4G go to 5G on separate networks. You still needed to be able to make a 3G call when 4G wasn’t available,” Zimmer said in an interview on “Mad Money.”

“The same thing’s going to be true with autonomous vehicles. … It’ll do five percent of the trips. 95% of the time you’re going to rely on a rideshare driver. So that’s all going to happen within the Lyft network, and we’ll scale up with our autonomous partners,” he added.

Lyft Autonomous’ AV partners include Ford Motor and Argo AI, Motional and Waymo.