One of the two Tesla Semi Truck prototypes which was lately colored in red from black has been spotted doing test runs carrying massive blocks of concrete, roaming the Californian 405 Freeway.

Tesla is now extensively testing the Semi Trucks as they recently invited Motor Trend to test the Model S and Tesla Semi prototype ranges, preparing for a 2020 production start, these tests are crucial for the Semi Truck program.

The latest video featured below is shot by a Tesla owner and enthusiast who randomly found the red Tesla Semi carrying heavy blocks on its trailer which might be the max weight that this variant can carry. Tesla is offering two variants with 300 miles and 500 miles of range.

According to Tesla’s initial specifications, its electric semi trucks will be able to run from 0-60 mph with 80k lbs of load in just 20 secs, we have seen the Tesla Semi’s impressive acceleration in the past so it should live up to the hype.

Let’s watch how the Tesla truck is performing with the dead weight at it’s back!