12 



MASS. EXPERIMENT STATION BULLETIN 36.3 



density, and one with fair volume and intermediate density. The charts also 

 indicate the density of traffic along the route; a flattening out being due to a 



POUNDS 

 6,000 



6,000 



4P00 - 



2P00 - 



6,000 



10 



20 30 40 



MILES 



Figure 4a. Cumulative Loading on Selected Original Routes, January 193.'i 



