Federal-Aid Highway Act of 1956
This page analyzes a single policy using structured scoring, historical evidence, source quality, and measurable outcomes.
Summary
Launched the modern interstate highway system and accelerated massive federally backed road construction through cities and metropolitan regions across the United States.
How to Read This Record
Impact Reading
Very high documented impact
Evidence Base
Limited evidence from Government sources.
Data Completeness
Needs Review record with 1 source and 0 metrics.
Outcome Summary
Expanded national mobility and suburban growth, but in many cities interstate routing destroyed or split Black neighborhoods, displaced residents and businesses, and reinforced unequal metropolitan development patterns.
Categories
Impact Scores
This score is a structured measure of how directly and materially this policy affected Black communities, weighted by evidence, durability, and equity. Harm offset reduces the total score.
Total Impact Score
30
Directness
4
How explicitly the policy targeted or affected Black communities.
Material Impact
5
The practical real-world effect on conditions, rights, or outcomes.
Evidence
5
Strength of sourcing and historical support for the assessment.
Durability
5
How lasting the effects of the policy were over time.
Equity
1
Whether the policy advanced fairness, inclusion, or equal access.
Harm Offset
0
Any offsetting harms, limitations, exclusions, or contradictory effects that reduce the total.
Scoring Notes: A landmark infrastructure law with major downstream consequences for Black neighborhoods, housing stability, and wealth.
Metrics
No metrics added yet.
Suggested Relationships
These policies may be related based on shared categories, era, and proximity in time.
1970 • Law • Republican Party
Civil Rights Era • Mixed
Shared Categories: 3 • Year Distance: 14
1974 • Law • Republican Party
Civil Rights Era • Mixed
Shared Categories: 3 • Year Distance: 18
1977 • Law • Unknown party
Post Civil Rights Era • Positive
Shared Categories: 3 • Year Distance: 21
1961 • Executive Order • Democratic Party
Civil Rights Era • Positive
Shared Categories: 2 • Year Distance: 5
1962 • Executive Order • Democratic Party
Civil Rights Era • Positive
Shared Categories: 2 • Year Distance: 6
1948 • Court Case • Unknown party
Civil Rights Era • Positive
Shared Categories: 2 • Year Distance: 8
1965 • Executive Order • Democratic Party
Civil Rights Era • Positive
Shared Categories: 2 • Year Distance: 9
1968 • Court Case • Unknown party
Civil Rights Era • Positive
Shared Categories: 2 • Year Distance: 12
Sources
National Interstate and Defense Highways Act (1956)
National Archives • Government
Published: Jun 29, 1956
National Archives milestone document explaining the act, its enactment date, and its sweeping effects on community development and neighborhood destruction.
View source