Find Your Lane: ADOT to Introduce Collector-Distributor Roads in the I-10 Broadway Curve Area

We’ve made a lot of changes in the I-10 Broadway Curve area during the past few years of construction – but perhaps the biggest changes are coming this summer with the introduction of the new Collector-Distributor (CD) roads along I-10 in both directions between 40th Street and Baseline Road.

And as these CD roads may take some getting used to, we want to provide a brief overview of how they work, so take note!

If you need to get on or off I-10 in either direction in the Broadway Curve area (I-10 between Baseline Road and 40th Street), your route will change.

You may need to exit the freeway earlier or find yourself on a longer ramp to enter or exit I-10 depending on your destination within the Broadway Curve area. These longer exit and entrance ramps are known as Collector-Distributor roads. As their name suggests, the CD roads will collect traffic from the I-10 mainline, State Route 143 and US 60 and distribute it to the CD roads.

For example, westbound I-10 drivers heading to SR 143 will exit I-10 south of Baseline Road to enter the westbound CD road, which eliminates the need for them to merge right in the same area where drivers from US 60 are entering westbound I-10.

Because three freeways converge in this small section of I-10 within the Broadway Curve area, traffic currently backs up when people slow down to transition from one freeway to another.

The idea of the CD roads is to keep the mainline I-10 lanes – or lanes that are for drivers traveling through the area – free from that weaving  by drivers changing lanes to enter or exit the freeway.

For the visual-inclined, we invite you to check out this animation showing how CD roads will work once they open to the public.

The westbound CD road will be almost three miles long, located along westbound I-10 from Baseline Road to 40th Street and is generally three lanes. The eastbound CD road will be just over one and a half miles long, runs along eastbound I-10 from 48th Street to Baseline Road and is generally two lanes.

There will be signage to guide drivers to the correct lanes based on their destinations. Also, there are no traffic signals or stop signs on the CD roads and the speed limit is 55 miles per hour. The roads are not accessible to pedestrians and bicyclists.

Remember it’s important for your safety and the safety of other drivers that you obey the speed limit and avoid distractions while driving on the CD roads.

The westbound CD road is scheduled to begin opening to drivers in early Summer 2024, while the eastbound CD road is scheduled to begin opening in late Summer 2024.

As the CD roads begin to open to motorists, construction on the I-10 Broadway Curve Improvement Project will continue through early 2025, which means there may be times when the CD roads or the I-10 mainline are restricted for construction activities. You can find the latest traffic restrictions on the Project Website or for more information on the I-10 CD roads, visit i10broadwaycurve.com/findyourlane.