If water runs down your driveway while the sprinklers are on, you are paying for water the lawn never receives. The fix costs nothing and uses a setting your controller almost certainly already has.
What is actually happening
Soil absorbs water at a fixed rate. Blackland clay absorbs slowly. When a sprinkler applies water faster than the soil can take it, the excess goes wherever gravity sends it, usually the street.
Running the zone longer does not help. Past the absorption point, every additional minute is runoff. This is why some lawns stay dry despite long run times.
How cycle and soak works
Instead of one long run, split it. Run the zone for a short period, pause to let water absorb, then repeat. Same total water, dramatically more of it reaching roots.
A practical starting point on clay is three shorter cycles with roughly half an hour between them, adjusted based on whether you still see runoff. On the caliche side of the metro the problem inverts: water drains through fast, so shorter and more frequent works better than long and deep.
Why most systems are not set up for it
Controllers ship with a simple schedule and most installers never change it. The capability is there under names like cycle+soak, multiple start times or repeat. If your controller has multiple start times, you can build it manually by scheduling the same zone three times with gaps.
Two things defeat it: coverage gaps and compacted soil. If parts of a zone get no water regardless, that is a design problem. If the soil is compacted enough that nothing penetrates, that is core aeration work. Our irrigation service checks all three before touching the schedule.
Working out your soak time
There is no universal number, but you can find yours in one afternoon. Run a zone and stand there with a timer. Note the minute runoff first appears. That is your cycle length, minus a minute or two for safety.
Then divide your total needed run time by that number to get how many cycles you need. If a zone needs 21 minutes and runoff starts at 7, you need three cycles of 7 minutes. Soak time between cycles should be long enough that surface water has disappeared, typically 30 to 60 minutes on clay.
Repeat per zone, because slopes run off faster than flat ground and shaded areas absorb differently than sun-baked ones.
When cycle and soak is not the answer
If water pools rather than runs off, you have a drainage problem, not an application-rate problem, and splitting cycles will make the pooling worse. That needs grading or drainage work.
If the soil is compacted enough that nothing penetrates regardless of rate, cycles will not help either. That is core aeration work, and it is common in newer subdivisions where construction equipment compacted the lot.
And if one part of a zone is dry while another is soaked, the issue is coverage or mixed plant types sharing a zone. Turf, beds and slopes absorb at different rates and should never run on the same valve. No amount of clever scheduling compensates for a zone serving two different appetites.
Water running down your driveway?
Often it is a programming fix rather than new parts.