How come Arlington is considered "burbs"?

[coredumped]

I'm not saying it should be in the Urban Neighborhoods section, but why isn't it? What defines urban neighborhoods vs suburbs? I tend to think of both san marco, arlington (mathews bridge area) more urban.
Is it "walking distance" to downtown?

[Lunican]

Urban neighborhoods are roughly the pre-consolidated city boundaries.

[DeadGirlsDontDance]

Arlington is not walking distance from downtown unless you can walk on water.

[Dog Walker]

Arlington didn't develop as a residential area until after the Mathews bridge was built.

Suburban:  Sub Urbes   Below the city i.e. those that were built lower down the hill from the fortified city on the hill.

[coredumped]

Thanks Lunican. Deadgirls, that was my question, but Lunican answered it. I don't think adding a bridge with a walking trail would make it urban.

[heights unknown]

Anyone know what the population of Arlington is?  Arlington, San Marco, San Jose, and parts of Northside and other areas not in the old City Limits are really all suburbs under the old law and rule before consolidation. I'll bet Jax would still have a hefty population in the high 200K or low 300k had it not consolidated.  But I look at Arlington as a neighborhood just like Riverside, Avondale, Springfield, etc.

Heights Unknown

[thelakelander]

According to the 2000 Census, Arlington had 54,449 residents, excluding everything south of Arlington Expressway and east of Southside Connector/9A.

Census Tract - Population

014601 - 5,881
014701 - 6,506
014702 - 3,143
014800 - 5,508
014901 - 5,649
014902 - 6,226
015001 - 4,979
015002 - 3,998
015100 - 3,945
015200 - 3,114
015300 - 3,060
015400 - 2,440

Total - 54,449

http://ftp2.census.gov/geo/relfiles/tract/fl/fl12pop.txt