阅读理解
A —Don’t follow too closely.
B— Keep distance
C— Accident area
D— Road closed
E— Road work ahead
F— Two-way traffic
G— One-way traffic
H— Bend ahead
I— Bus lane
J— Electronic toll collection (ETC)
K— Service area
L— No passing
M— No parking
N— Dead end
O— No horn
P—Falling rocks
Q—Slow down at exit