St. Charles County Transportation Plan 2030 - East-West Gateway ...

passes through the signal of the north ramps of I-70 and negotiates the eastbound on ramp. The
interchange will operate at capacity or LOS E. A corridor study is included in Legacy 2030 for this
road which may lead to improvements that will relieve these serious congestion problems.
Rt. 94
Parts of Rt. 94 are Minor Arterial and Major Collector roads. They are discussed in their appropriate
sections later.
The Rt. 94 sections that are designated as Principal Arterials have been divided into a number of
segments as each one is quite different from the other. The section from Rt. 370 through the city
of St. Charles to Kingshighway is basically a two-lane street and will have only minor increases in
traffic by 2030 as this area is not growing. It will average between 8,000 and 10,000 vehicles per
day. The characteristics of the streets are not expected to change much and since it is presently
operating at LOS D it is expected to remain that way.
From Kingshighway to I-70 it becomes a five-lane road with a number of signalized intersections
and traffic is expected to increase slightly to 28,000 by 2030 due to additional development in the
area. At the West Clay St. intersection it may reach LOS E during the peak hours as this intersection
is presently operating near capacity. The operation of the new I-70 interchange will help increase
traffic flow on this segment.
From I-70 south to Rt. 364, Rt. 94 is a four-lane divided road with auxiliary lanes between signals
and has high volumes of traffic. By 2030 these volumes are expected to increase to 66,000. The
new I-70/Rt. 94 interchange will greatly contribute to this additional traffic. Five signalized
intersections exist in this segment and volumes on the side streets will be increasing. The LOS of
the signals will be the controlling factor and it is expected that they will all be operating at capacity
during the peak hours. Backups will extend for some distance from each intersection, possibly from
one intersection into the next, and the peak hours will be extended. As a result, the road will operate
at LOS F with demand in excess of its capacity.
The section of Rt. 94 from Rt. 364 west to Mid Rivers Mall Dr. will have been converted to Rt. 364
by 2030 and has been discussed above under freeways.
From Mid Rivers Mall Dr. to I-64, Rt. 94 will be a four-lane divided road with many traffic signals.
Volumes are expected to rise to 55,000 west of Mid Rivers Mall Dr. and increase to 60,000 east of
I-64. Most of the signals will be operating at capacity during the peak hours with backups extending
for some distance. The peak hour periods will increase. The road will be operating at LOS F with
demand greater than its capacity.
Rt. K
The analysis of forecasted traffic on this road has been divided into two sections. The northern
section from I-70 to Rt. N has the most commercial development and signalized intersections.
Volumes are expected to increase to 68,000 between I-70 and Mexico Rd. and to 55,000 between
Mexico Rd. and Rt. N by 2030. The road is presently operating at capacity south of I-70, at Mexico
Rd., and at Rt. N during the peak hours. With higher volumes forecasted, it can be expected that
congestion will worsen and traffic demand will be in excess of the intersection’s capacity at LOS
F. Demand at the major intersections will cause serious backups that will affect all the other
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