The Google-backed ride sharing company will use the latest funding to expand geographically across the US.

Sidecar, a US-based ride sharing company backed by investors including internet company Google, has raised $15m in series C funding.

The round, revealed by CEO Sunil Paul in a blog post on Sunday, featured venture capital firms Avalon Ventures and Union Square Ventures, and entrepreneur Richard Branson.

Sidecar will invest the money in expanding its ride sharing service from its home city of San Francisco to the rest of the US. It also recently introduced a service called Shared Rides,…