Route 30 was from Route 210 near San Dimas to Route 10 in Redlands via the vicinity of Highland.
Route 330 was once the ending piece of Route 30. What we know now as Route 210
from Route 330 to Route 10 was once Route 106. Eventually, that ending piece was renumbered as Route 330.
The route was submitted for Interstate approval in 1968, but was not accepted.
In 1998, Route 30 was transferred to Route 210. That portion is now pending Interstate submission.
To learn about the (former) Route 30 Freeway Project, from Route 66 to Route 215,
visit this Caltrans link to Route 30.
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