This entire highway is being upgraded to Interstate Highway standards.

As such, this section of freeway meets Interstate Highway standards.

This also means that substantial portions of the route are not precisely to Interstate Highway standards, but they are usually close.

Some state highways become so heavily traveled they are built to Interstate Highway standards.

Engineers recommended to tunnel under the pass rather than attempt to build a route across it that conformed to Interstate Highway standards.

Once State Route 215 was upgraded by construction to Interstate Highway standards, it became part of I-215 in 1994.

Major portions of this highway have either been built new or converted to Interstate Highway standards as of early 2011.

Furthermore, these routes were neither planned according to nor constructed to the official Interstate Highway standards.

In addition, these toll facilities were grandfathered from Interstate Highway standards.

The approaches to the bridge were soon after converted to Interstate Highway standards.

This entire highway is being upgraded to Interstate Highway standards.

This also means that substantial portions of the route are not precisely to Interstate Highway standards, but they are usually close.

Some state highways become so heavily traveled they are built to Interstate Highway standards.

Engineers recommended to tunnel under the pass rather than attempt to build a route across it that conformed to Interstate Highway standards.

Once State Route 215 was upgraded by construction to Interstate Highway standards, it became part of I-215 in 1994.

Since the Long Bridge is a lift bridge with only a two lane roadway, it was far from meeting Interstate Highway standards.

Major portions of this highway have either been built new or converted to Interstate Highway standards as of early 2011.

Furthermore, these routes were neither planned according to nor constructed to the official Interstate Highway standards.

In addition, these toll facilities were grandfathered from Interstate Highway standards.

The approaches to the bridge were soon after converted to Interstate Highway standards.