14 
BULLETIN 586, U. S. DEPARTMENT OF AGRICULTURE. 
Table 17. — Volume and character of traffic on Russell Road. 
[This table gives the results of traffic counts taken before and after improvement of the road. 
Loaded 1-horse wagon 
Unloaded 1-horse wagon. . . 
Loaded 2-horse wagon 
Unloaded 2-horse wagon. . . 
Loaded 4-horse wagon 
Unloaded 4-horse wagon. . . 
One-horse pleasure vehicle. 
Two-horse pleasure vehicle. 
Rubber-tired horse vehicle. 
Saddle horse 
Motor cycle 
Excessively heavy vehicle. 
Motor runabout 
Motor touring car 
Loaded motor drav 
Unloaded motor dray 
Average before im- 
provement. 1 
North- 
bound. 
South- 
bound. 
Average after improvement. 
Maximum. 
North- 
bound. 
72 
271 
2 
6 
South- 
bound. 
75 
Average. 
North- 
bo und. 
11 
107 
2 
2 
South- 
bound. 
10 
107 
3 
2 
i Average of seven days in June, 1915. 2 August 3 to December 24, 1916. 
SUMMARY OF EXPERIMENTS ON THE RUSSELL ROAD. 
The following report describes the condition of the experiments 
when inspected on January 11, 1917. 
Experiment No. 1. — Bituminous Macadam, Refined Water-gas Tar. 
The surface of this experiment is true and regular, but has a very 
rough appearance, due to the wearing away of the seal coat. It 
has raveled slightly in a few places, but is in excellent condition for 
the application of another seal coat and should have it at the earliest 
possible date. 
Experiment No. 2. — Bituminous Macadam, Refined Water-gas Tar, On, 
Asphalt Seal Coat. 
This is in practically perfect condition and shows no tendency to 
ravel or disintegrate. The surface is much smoother than that of 
No. 1, and offers an interesting comparison between the relative 
wear of tar and asphalt for a seal coat material. 
Experiment No. 3. — Bituminous Macadam, Refined Coal Tar. 
The general appearance of this surface is between that of experi- 
ments Nos. 1 and 2. It shows some tendency to ravel and needs a 
medium heavy seal coat. 
Experiment No. 4. 
-Bituminous Macadam, Refined Coal-tar, Oil Asphalt 
Seal Coat. 
This surface appeared to be intact and satisfactory in every 
respect at the time of inspection, and was appreciably smoother than 
that of No. 3. 
