Apple Inc. is accelerating efforts to build an electric car, designating it internally as a “committed project” and setting a target ship date for 2019, according to people familiar with the matter.

The go-ahead came after the company spent more than a year investigating the feasibility of an Apple-branded car, including meetings with two groups of government officials in California. Leaders of the project, code-named Titan , have been given permission to triple the 600-person team, the people familiar with the matter said.