I think you'd agree that Saia LTL Freight has implemented many positive changes these last couple of years. During this time, not only did we introduce our "Quality Matters" campaign, which exemplifies our mission to provide our customers with quality service each and every day, but we also invested heavily in employee training, new equipment, and advanced technology. I believe these initiatives and investments, coupled with the dedication of our employees, have helped us provide Saia shippers with six consecutive quarters of 98% on-time.
Employee training is an area where we have focused considerable attention. In addition to our ongoing driver safety and dock-to-driver training programs, our dock mentoring program pairs experienced personnel with newer employees - thus increasing productivity and reducing claims - while our "Quality 5" training program is now offered to all dockworkers, city drivers and supervisors.
We believe all of our programs, as well as our Quality Assurance Department and Load Quality Inspectors, are responsible for the 20% reduction in cargo claims expense we've experienced since the first quarter of 2012 as well as why Saia's average employee tenure of eight years is nearly twice the national average.
We also are continuing to implement initiatives that allow us to re-optimize our lanes so we can improve upon our service and transit times even further.
Aside from training and improved service, we have also invested in new equipment. In 2012 alone, we spent more than $83 million. This included the purchase of over 500 new tractors and nearly 800 new logistic post trailers. We also partnered with Vnomic's Inc. by installing electronic onboard recording devices in 100% of our tractors. As such, we, as well as our customers and the motoring public, benefit from the added safety these devices provide - especially in conjunction with the Bendix Early Warning and Iteris Lane Departure Warning Systems.
With regard to Vnomics, we continue to see improved fuel economy through the utilization of a driving technique called “progressive shifting," which centers on drivers shifting gears when it is most optimal for the engine to return the greatest efficiency. At some terminals - our Jacksonville, Florida facility, for example - every Saia LTL Freight driver is achieving the 100% target level. The MPG in Jacksonville averaged 6.7 MPG in April, or four tenths of a gallon better than the company average. Four tenths improvement at $3 million per tenth means we will save $12 million in fuel when all drivers hit the 100% shift efficiency target.
While the cost savings are significant - and exciting - the improvement in fuel economy is also noteworthy in terms of our drive to become more "green." In fact, fuel economy standards have been the primary way in which the United States has sought to control greenhouse gas emissions for cars and light trucks, which along with other parts of the transportation sector, account for about one-third of the nation’s carbon dioxide emissions.
Going forward, we plan to spend $93 million on new equipment including the purchase of 335 tractors and 1,700 trailers, which will have been delivered in full to us by the end of this month. Along with increased fuel efficiency, the tractors also produce cleaner emissions while all of the new trailers offer logistic post capabilities that allow for better space utilization and freight securement.
Another new program this year involves installing trailer air deflector fairings, or trailer skirts, on all our 28 foot trailers. The installation of the 4,000 skirts will allow our trailers equipped with the fairings to be California Air Resource Board, or CARB, compliant and EPA Smartway-verified. The modifications are scheduled to be completed later this month.
In closing, I think it is clear that Saia LTL Freight's future is bright. We hope our customers appreciate all the improvements we've made and are eager to see what lies down the road - together. As always, thanks for everyone's continued business and support.