14 BULLETIN 586, U. S. DEPARTMENT OF AGRICULTURE. 
Taste 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. 
Average after improvement.? 
Average hefore im- 
provement. 
Maximum. Average. 
North- South- North- South- North- South- 
bound. | bound. | bound. | bound. | bound. | bound. 
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... 
10) Saddle horses-sc- 02 7-4 eeee eee ee 
1A} Motoneycless2s eb eniete see 2 Je : 
12 | Excessively heavy vehicle........... 
13 | Motorrunabout......--.-.--.------- 
14) | Motor tourmeicars 2222 22. eee 
15 | Loaded motor dray....-....---..--- 
16 | Unloaded motor dray.........------- 
OOON DOU CON 
= 
ODMR WOO WR tr 
on 
RSPNOOODNONCRrFOFWEH DO 
on 
BD NOORDOONCCOFFROSO 
1 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. 
EXxPEeRmMeENT No. 1.—Bitumrnous Macapam, 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. 
ExpreriMent No. 2.—Briruminous Macapam, REFINED WatTER-GAS Tar, Om 
‘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.—Britruminous MacapAm, 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 Macapam, ReEFrinepD CoaAt-Tar, Om ASPHALT 
SEAL Coat. 
This surface appeared to be intact .and satisfactory im every 
respect at the time of inspection, and was appreciably smoother than 
that of No. 3. 
