Main Street to Interstate 15

This segment from Main Street to Interstate 15 measures 1.09 miles and features new regular lanes and express lanes, reconstruction of the Main Street ramps and addition of new roadways between the Main Street ramps and Interstate 15 to eliminate the need for vehicles to weave and merge between the 91 and I-15. Also included in this segment are new express lane connections between the 91 and I-15.

Click here to view detailed project design for Main Street and click here for 91/15 interchange. Please note that design is ongoing and project maps are draft subject to change.

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Main Street to Interstate 15

  • Two Tolled Express Lanes will be built in both directions between the County Line and Interstate 15, replacing the existing single carpool lane in both directions.
  • One regular lane will be built in both directions from the 71 to Interstate 15.
  • The westbound on-ramp and eastbound off-ramp on the west side of Main Street will be maintained and adjusted slightly to allow for the 91 widening in each direction.
  • Diamond interchange ramps will be maintained on the east side of Main Street, but the Main Street eastbound on-ramp and westbound off-ramp to and from the Interstate 15 connectors will include a new "collector-distributor roads" to collect vehicles and separate them from 91 traffic. These new roads will eliminate the need for vehicles to weave and merge between the 91 and I-15.
    1. Drivers using the eastbound Main Street on-ramp to the 91 will split from I-15 drivers by traveling under the new collector-distributor road mentioned above before merging onto eastbound 91.
    2. Drivers using the westbound 91 off-ramp to Main Street will exit onto the new collector-distributor road and merge with vehicles from the I-15 connectors before exiting onto Main Street.
  • The connector from northbound I-15 to westbound 91 will be widened to two lanes where it merges with the new westbound collector-distributor along the 91.
  • A new tolled express lane direct connector will be constructed to and from the 91 tolled express lanes to new tolled express lanes in the median of I-15 south of the 91. This will provide direct access from eastbound 91 express lanes to a new median express lane southbound on I-15 and from a new northbound median express lane on I-15 to the westbound 91 express lanes.
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