6 BULLETIN 1279, U. S. DEPARTMENT OF AGRICULTURE 
Complete data as to the payment of principal and interest on 
highway bonds could not be secured for all the States. In a few 
States the custom of charging all bond interest to the cost of con- 
struction for the period from the time bonds are sold until the con- 
struction work on the road is completed, seems to be quite general. 
In a few other cases the interest payments on highway bonds could 
not be segregated for other bond and interest payments, due to the 
fact that -these bonds were not designated as highway bonds but 
simply as general bonds against the municipality in question. It is 
estimated, however, that these payments which could not be segre- 
gated amount to approximately $5,750,000, so that the grand total 
of all payments for principal and interest on highway bonds actually 
reached the approximate total of $95,000,000, of which approxi- 
mately $60,000,000 was for interest and $35,000,000 for principal 
payments. 
Of the grand total disbursements of $1,036,587,772, the sum of 
$413,241,662 was expended by or under the supervision of the 
respective State highway departments and $623,346,110 by the 
various counties, towns, townships, and districts without any super- 
vision by the State highway departments. 
The following statement shows in more detail the expenditures 
for each of the various purposes, first by the local communities 
without the supervision or control of the respective State highway 
departments, and, second, the expenditures by or under the direct 
supervision of the State highway departments during the year 1921. 
Highway Expenditures, 1921 
Without State supervision 
Construction, roads and bridges S3 16, 225, 470 
Unclassified construction (probably largely maintenance) 18, 766, 090 
334, 991, 560 
Maintenance, roads and bridges 174, 066, 423 
Engineering and administration 17, 149, 498 
All other items 97, 138, 629 
Total by local communities 623, 346, 110 
By or under supervision of State highway departments 
Construction, roads and bridges 291, 973, S13 
Maintenance, roads and bridges 74, 526, 746 
Engineering and administration 18, 881, 855 
All other items 27, 859, 248 
Total by States 113, 241, 662 
Grand total by States and local communities 1,036, 587, 772 
In 1922 the total expenditures by the States, counties, towns, and 
districts for the items of construction, maintenance, engineering, and 
administration amounted to $898,352,307, of which $429,896,572 was 
expended by or under the supervision of the respective State highway 
departments and $468,455,735 by the local communities without 
State supervision. No data were secured for 1922 as to the pay- 
ments for principal and interest of highway bonds nor as to the 
various miscellaneous items not chargeable directly to construction 
