SPECIFICATIOXS FOR STEEL HIGHWAY BRIDGES. 
19 
of two-way traffic shall be not less than that shown in 
Figure 2. The roadway width shall be increased at 
least 9 feet for each additional line of traffic. 
r3-6 
•■*-j — » 
-^ 
Curb-^ 
Horizontal Clearance 
Fig. 2.— Clearance diagram for two-way highway traflBc 
s 
3-0 
r3-0 
9-'0(N0t Less) 
d 
o 
sj- txo 
— 5 
CD 
4=^Curb 
12-5 
o 
-^i 
Curb-^ 
10-0 
I 
1 8-0 (Not Less) 
7-0 
(Not Less) 
25'-0 (Not Less) 
3-0 
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If) 
o 
en 
a? 
i_ 
■Curb 
Horizontal Clearance 
Fig. 3.— Clearance diagram for a single track railway and one-way highway traflSo 
Bridges constructed for the combined use of highway 
and electric railway traffic shall have roadway clear- 
ances not less than those shown in Figures 3 and 4. 
