How thoroughly has NHTSA tested roof strength and ejection, which the windshield glass helps provide?

NHTSA's crash test database holds 427 tests of roof crush and ejection, led by FMVSS 226: ejection mitigation with 252 component tests.

NHTSA crash and component tests in its research database for roof crush and ejection. FMVSS 226: ejection mitigation: 76; FMVSS 216: roof crush resistance: 99; FMVSS 226: ejection mitigation: 252.

Source: NHTSA Vehicle Safety Research and Development Database, crash test database API (vehicle and component tests) · file downloaded 2026-10-05

Data and chart by CalcScrape: Windshield Replacement Cost Calculator