Thank you for contacting Geotab Technical Support. Since the speed condition is missing, the rule will not work. If you add the speed condition to what you currently have, the rule will break only if the driver backs up a speed greater than 45 mph over the posted speed limit. A work around to having the speed condition, is setting up the rule to break at any speed lower than the posted speed limit. I attached a sample code to get you started below:
Should you have any further questions, feel free to reach out to our technical support team for assistance. Have a great rest of your day.