It has been my experience that Odorized Mineral Spirits will effectively break up the grease quite easily. The problem is to then remove the OMS and the grime that is in suspension. Rubbing/scrubbing in straight Dawn dish detergent into the stain area and virorously thoroughly hand washing the affected area in a few inches of water in a bathroom sink seems to work pretty well at displacing the OMS/grime. Then a fresh water rinse to remove the Dawn. From there straight into the washing machine on hot.
The problem, I think is that standard laundry detergent works on "not oil" while dish soap works on cooking oil. So using a standard laundry detergent is the wrong kind of detergent for the job in this case.
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I shouldn't have to "make myself more visible;" Drivers should just stop running people over.
Car dependency is a tax.