UPDATE: 10 a.m.

A 68-year-old man was taken to the hospital in critical condition following a rollover crash that closed the H-1 westbound Vineyard Boulevard off-ramp early this morning, according to Honolulu police.

Police said at about 4:11 a.m., a 35-year-old driver heading westbound on H-1 attempted to exit on the Vineyard Street off-ramp when he collided with the car driven by the 68-year-old and then crashed into a guardrail.

The car he hit was redirected and collided with a cement wall before rolling over.

Firefighters arrived on scene within minutes and used hydraulic rescue tools to extricate the 68-year-old man before transferring care to Emergency Medical Services at 4:37 a.m.

EMS administered advanced life support for head trauma and other serious injuries before transporting the man to a trauma center.

Police said EMS also took the 25-year-old passenger of the first driver to the hospital in serious condition.

The first driver was not injured, police said, and was determined to be under the influence. Police arrested him on suspicion of first-degree negligent injury and operating a vehicle under the influence of an intoxicant.

Police said at this time, both speed and alcohol appear to be contributing factors, and that the investigation is ongoing.

The crash was one of two major incidents on the H-1 westbound this morning. Hours later, all westbound lanes before the Lunalilo offramp were closed for a police investigation following a separate medical emergency. The freeway was fully reopened by 7:34 a.m., but drivers faced significant delays with traffic backed up to the Kahala Mall area.

Officials have not released further details on the cause of either incident. Motorists are advised to continue expecting residual delays as congestion eases.

PREVIOUS COVERAGE

All lanes on H-1 westbound before the Lunalilo offramp have reopened following a police investigation that caused significant delays this morning, according to the state Department of Transportation.

The closure was announced just before 7 a.m. after a medical emergency blocked two left lanes westbound past the Vineyard exit. The Vineyard offramp had already been closed due to an earlier crash.

By 7:34 a.m., all lanes westbound were reopened, including the Vineyard offramp. However, traffic remained heavily congested, with backups reported as far as the Kahala Mall area.

Officials urged drivers to expect residual delays as congestion clears.

No further details on the medical emergency or the earlier crash were immediately available.