H-1 Freeway Evening Rush Hour Traffic Images
Due to the moderate-to-high speeds on H-1 EB, acceleration and merging
from the University Ave. on-ramp is difficult and long queues develop
during the rush hour. It is surprising that
more motorists do not choose the King St.-Old Waialae on-ramp route.
(More should be expected to do so after a twin left-turn bay at King/University intersection is provided.)
Thursday, October 17, 1996.
(Camera looking north)
Frequently the McCully on-ramp acts as a bottleneck to the H-1 WB
mainline. Most motorists merge at the very beginning of the ramp. A
large difference in traffic density before and after the ramp is observed.
Friday, October 18, 1996.
(Camera looking east)
The Punahou off-ramp WB (top side) often fills up to its capacity,
aided by the long cycle of the signal at the top of the ramp, and the
different lane utilization on the ramp (e.g., there is no queue on the right lane of the ramp).
Tuesday, October 29, 1996.
(Camera looking south)
The "bumper-to-bumper" in-flow of the Lunalilo on-ramp WB creates a
significant bottleneck on the H-1 WB. Densities drop considerably downstream the merge area. A similar phenomenon is observed on the other side of the freeway (right side) caused by the
confluence of the Vineyard and Ward ramps onto H-1 EB.
Tuesday, October 29, 1996.
(Camera looking east)
Heavy volume on the auxiliary lane (from the Vineyard on-ramp) and the
Ward on-ramp are a bottleneck for the H-1 EB. The left most lane of the
freeway tends to maintain a continuous movement, as shown by the headways.
All other lanes experience stoppages.
Thursday, October 17,
1996.
(Camera looking west)
Same location as above. The large difference between upstream and
downstream density on H-1 EB (left side) is visible.
The Lunalilo on-ramp on H-1 WB (right side) is problem free at this instant which occasionally happens in the PM peak period, partly because the bottleneck at McCully reduces the mainline throughput. (This location always is problematic in the AM peak pe
riod).
Thursday, October 17, 1996.
(Camera looking west)
The continuous queue on School St. on-ramp blocks the School St.
off-ramp traffic which occasionally extends to the freeway. The top side
of the freeway is H-1 WB.
Tuesday, October 29, 1996.
(Camera looking north)
The School St. on-ramp is "bumper-to-bumper" causing frequent stoppages
on the right lane of H-1 WB.
Tuesday, October 29, 1996.
(Camera looking north)
On the top side of the photo, the heavy flow on School St. on-ramp can
be
observed. Importantly, this photo also shows the bottleneck effect of
Liliha St. on-ramp on H-1 EB: observe the large difference in the density
of traffic upstream and downstream the ramp (bottom side).
Tuesday, October 29, 1996.
(Camera looking north)
The effect of the Liliha St. on-ramp can be seen here clearly: the
right lane on H-1 EB is completely stopped.
Thursday, October 17, 1996.
(Camera looking north)
Due to the bottleneck effects of Ward/Vineyard and Liliha on-ramps the
town-bound side of H-1 (left side) appears to be much busier during the PM peak about the Palama Canal.
The School St. on-ramp "regulates" the out-of-town (WB) traffic, which almost always flows well at this point despite the heavy in-flow on the Vineyard on-ramp.
Tuesday, October 29, 1996.
(Camera looking west)
The signalized intersection of Likelike with School St. causes very
long queuing on the Likelike off-ramp from H-1 EB. This queuing
occasionally interferes with the H-1/Moanalua Fwy. merge.
Friday, October 18, 1996.
(Camera looking southeast)
The back-up of the Likelike off-ramp slows the Moanalua Fwy. traffic by
Middle St. The conditions can be worse at this location but at the time of this photo, H-1 was empty of traffic (coming out of the tunnel).
Tuesday, October 29, 1996.
(Camera looking west)