Today our “Primary Highways” series continues with a visit to our nation’s capital and the neighboring state of Maryland.

The oft-used phrase “inside the beltway” literally means inside the Capital Beltway (I-495 and I-95), which forms a wide circle outside of Washington, DC through the surrounding suburbs of Virginia and Maryland.


From the western side of the beltway, we begin on Interstate 66 and US 50 heading east from Virginia over the Potomac River. I-66 turns north while US 50 continues eastward as Constitution Avenue, passing alongside the National Mall and all the national memorials and monuments, which are arranged around the mall and the parkland along the Tidal Basin.

[By Alex Boykov (Own work) [CC-BY-SA-3.0 or GFDL], via Wikimedia Commons]
On the north side of US 50, opposite with Washington Monument, is the Ellipse, a public park that borders the iconic south lawn of the White House. This building and the privilege of occupying it are the nominal reason we are doing this series.
Past the White House and Washington Monument, US 50 meets US 1, and the two continue as Constitution Avenue alongside the eastern half of the Mall. This section of Mall houses the many museums of the Smithsonian Institution. As a child visiting Washington, DC, the “Smithsonian” was synonymous with the Air and Space Museum. It was of course exciting to connect with all things space. Years later, I visited the Air and Space Museum again with my family (and saw a Star Trek anniversary exhibit), but also was enticed by a welcoming sign to the interesting circular building that housed the neighboring museum. The Hirshhorn Museum is the center on the Mall for modern and contemporary art, and a place I try to visit when I have time alone in the capital. It’s a been a while, so I would like to visit again sometime soon. You can see the Hirshhorn in the image of the Mall shown above as the cylindrical building just left of the center. At the far eastern end of the Mall is the Capitol.

The huge building serves as model for many (though as we have seen, not all) state capitol buildings. Though it had a long history of designs and changes before acquiring its current design and the large iconic cast-iron dome we know today. You can read more about this history here. Of course, the institutions housed inside have served as models as well, sometimes in a less-than-ideal way.
The Capitol is surrounded by several blocks of grounds, including the Capitol Reflecting Pool. While wandering around these grounds on foot, one would probably not suspect that there was a major highway passing underneath. I-395 traverses the center of the city in the long Third Street Tunnel, connecting to US 50 (New York Avenue) in the northern sectors. The densely packed residential sections of the Capitol Hill neighborhood can be found to the east, and a lively urban neighborhood to the northwest around Logan Circle.

[By AgnosticPreachersKid (Own work) [CC-BY-SA-3.0], via Wikimedia Commons]
I would be remiss if I did not mention the Black Cat, and institution for independent music that also happens to have a great name.

South of the Third Street Tunnel, I-395 continues towards Virginia and a junction with the Beltway at the Springfield Interchange (aka, the Mixing Bowl). Before crossing the Potomac, it intersects with I-695, a short connector to the Anacosta Freeway in the southeast section of the city. It is signed as I-295 and also as DC 295. It is the only signed DC highway that currently exists, but it is another thing that gives the District of Columbia the trappings of a state, except of course that it isn’t a state and doesn’t have voting representatives in Congress. Hence another state-like item, the district’s license place, continues to bear the Revolutionary War slogan “Taxation without Representation”.

DC 295 continues northeast to the border with Maryland…


…where it continues as Maryland Route 295, the Baltimore-Washington Parkway. The parkway is partly maintained by the National Park Service. In this segment, it is a wide road through wooded surroundings, although industrial and suburban areas are never far away. Further north, it becomes an expressway through the suburbs south of Baltimore as it heads towards that city. The parkway ends at a I-95. Nearby, a larger and impressive junction over water takes the short I-395 (completely unrelated to the one we just left in Washington, DC.) until downtown Baltimore, passing by Camden Yards and just to the west of the Inner Harbor.

[By Fletcher6 (Own work) [CC-BY-SA-3.0; or GFDL;], via Wikimedia Commons]
The Inner Harbor is considered an urban planning achievement, turning a moribund harbor in a major tourist and business destination. It look quite vibrant, with modern buildings and attractions like the National Aquarium.

Baltimore has quite a diversity of architecture and landscape. It is most well-known for its rowhouses. A particularly unique set is the colorful row in the Charles Village neigbhorhood:

Perhaps more typical are the long stretches of similar brick rowhouses. Sadly, many seem to be in disrepair, as along this street in a neighborhood west of the Inner Harbor.

[Photo by larrysphatpage on flickr. (CC BY-NC-ND 2.0)]
One interesting view in the same neighborhood features this full overhead sign along an abandoned ramp that is used by pedestrians.

[Photo by larrysphatpage on flickr. (CC BY-NC-ND 2.0)]
US 1 is in fact nearby, so the sign is accurate, but it could still be considered an example of a Thomasson, a maintained architectural feature that no longer serves its original function. It was part of the cancelled I-170 highway.
Baltimore is also home to Johns Hopkins University. It is of course a renowned research and medical university, but the division I know best is the Peabody Institute, as several musical friends and colleagues have studied there, particularly in their classical and music-technology programs.

We head south from Baltimore towards the Chesapeake Bay on I-97, where has the distinction of being the shorted two-digit interstate. It passes through hills and suburban towns to US 50 near Annapolis, the state capital. I remember visiting Annapolis in 1999 and 2000. The 1999 visit included walking around the historic district and into the statehouse, one of the oldest in the country with a distinctly colonial look about it, and watching July 4 fireworks on the bay. It was also during an intense heatwave, with some days over 100F. I didn’t mind the heat too much, and it made it great weather for swimming. The towns and cities along the bay, including Annapolis, seemed intimately connected to the water.

US 50 (with US 301) continues east on the Chesapeake Bay Bridge to Maryland’s eastern shore region. It then heads south, avoiding Delaware, before turning east again towards the Atlantic Ocean. It’s final terminus is in the resort town of Ocean City. The highway has a cerimonial terminus at MD 528, not far from the Ocean City beach and boardwalk, with a sign stating that is 3072 miles to its western end of Sacramento, California. I have seen the companion sign on the Sacramento side stating that is 3072 miles to Ocean City. Apparently that sign is stolen quite often.

Back in Baltimore, we return to the western neighborhoods, not far from the rowhouses we explored earlier, and head west on US 40. Just past Gwynns Falls / Leakin Park, we come to a parking lot that is the eastern terminus of Interstate 70. It was originally planned to go further through the city, but that extension was ultimately cancelled. In this case, we take I-70 westward out of the city.
This part of the state is quite sparse west of the Baltimore metropolitan area is quite rural and sparse, and in some ways would seem to be a separate state, more in common with West Virginia. I-70 and US 40 run together or nearby for much of the region. As I-70 heads northwest into Pennsylvania, I-68 continues with US 40 west through the Appalachian Mountains, including this cut through Sideling Hill.

[By Analogue Kid at en.wikipedia [CC-BY-2.5], from Wikimedia Commons]
This does seem a world away from Ocean City, and from Baltimore and Washington, DC., but in total Maryland is actually a fairly small state.
This concludes this edition of Primary Highways. We will next be visiting Wisconsin.
We start in New Orleans, which I visited in November of 2006, during the recovery from Hurricane Katrina. Coming in from the airport on I-10 we approached the downtown. The highway comes close to the Superdome and the downtown buildings. A large interchange connects to Business US 90, which heads over the Mississippi River via the Crescent City Connection. It was good introduction.
I did set aside some time to see what had become of the Lower Ninth Ward. In a rented car, I headed east on Claiborne Avenue (LA Highway 39) and crossed over the canal into the district.







The river, too, is quite wide an impressive as it passes by the Crescent City – the nickname in fact comes from the bend in river as it passes by the city. We cross the river on the Crescent City Connection to the “west bank”, which is actually south here. We continue on US 90 Business and turn south onto LA 23 towards the town of Belle Chase. LA 23 crosses the Gulf Intercoastal Waterway via an old bridge and tunnel pair, and then hugs the west bank of the Mississippi to the mouth of the river.

New Orleans continues to function as the hub for this particular virtual exploration. We next head west on I-10 and turn south onto I-310, which crosses the Mississippi on the cable-styled Hale Boggs Bridge.
We then head north (back on the east bank of the Mississipp) via US 61 to the town of Laplace. I was disappointed to find out this was not named for the Laplace transform in mathematics and signal processing, but on the plus side it is known as the “andouille capital of the world”. And we would be remiss if we did not stop here to sample the famous and tasty sausage.


We then cross the Mississippi again and turn south on Louisiana State Highway 1. At first, it follows the west bank of the river, but then heads southward, beginning a long parallel with LA 308 on opposite banks of Bayou Lafourche. We pass the town of Belle Rose, which I had written about 

South of Thibodaux, we turn west on US 90. The is a major highway and being upgraded to interstate standards, passing by the Bayou Teche National Wildlife Refuge as well as several towns. We turn south onto LA 329 to Avery Island. This actually is not an island at all, but it is a salt mound that rises in an oddly circular fashion from the flat landscape. It is most known for being the home of Tabasco hot sauce. We at CatSynth are of course fans of all things hot and spicy, and so visiting this factory and a tasting session would be in order.


We then come to the city of Lafayette, where we cross I-10 and continue northward on I-49. The area along the highway was part of an ancient flow of the Mississippi that apparently was wider and further west than it is today. Heading northward, the wet environment of southern Louisiana gives way to a drier landscape. Via LA 1 we come to city of Natchitoches, which has the feel of an older historic town.
We continue north on I-49 to its end at I-20 near Shreveport, the third-largest city in the state. The bypass highway I-220 spans nearby Cross Lake on a graceful modern bridge. The view from below with the arches is an interesting optical effect.



US 41 / Lake Shore Drive continues north and south of bridge as a scenic expressway with city buildings to one side and beaches along the lake to the other. The south end of the expressway is in the Hyde Park neighborhood, home of a certain Barack Obama.
If we take I-290 west from this geometric oddity of an interchange, we come to the suburb of Oak Park. It was here that Frank Lloyd Wright began his storied architectural career. His home and studio in the town is a landmark, and there are numerous early examples of his prairie-style houses. Looking at his home and studio, one can see the elements that would be later refined in prairie style.

Back at the Circle Interchange, we head south on I-90/I-94, the Dan Ryan Expressway., one of the widest and busiest highways in the country. It has wide sections for both local and express lines, and a line of Chicago’s “L” runs down the center. I-90 veers off onto the Chicago Skyway, but I-94 continues south (though designated as “east”) on the Dan Ryan Expressway until the junction with I-57.
Continuing south on I-57, we pass by our friend I-80 in the southern suburbs of Chicago and eventually come to Champaign and Urbana after crossing I-74 – it does seem that Illinois has a lot of interstate highways. This cities are home to the University of Illinois at Urbana Champaign, the flagship campus of the University of Illinois. It hosts the NCSA (The National Center for Supercomputing Applications) that created the first graphical web browser Mosaic.
Before we overdose on computer history, we exit Champaign-Urbana on I-72 heading westward. (Did we mention that Illinois has a lot of interstate highways?). This view along the highway suggests just how flat the landscape is in this region, with the road completely straight.


We head south from Springfield on I-55, on another incredibly straight stretch of highway through very flat landscape. For those who have lived among hills our entire lives, these flat plains are a novel experience. It’s not only the land, but also the sky.
There is a significant break in the flat landscape of western Illinois along the Illinois River. Illinois Route 100 runs along the the west bank of the river amidst trees and bluffs. It then crosses a bridge and continues along the east side until the Illinois River meets the Mississippi River.
The Great River Road continues past the end of IL-100 and into the greater St. Louis metropolitan area. As the landscape along the river becomes more suburban and then urban in St. Clair county, the road bounces around many other designations, including I-70 in East St. Louis. From here we can continue across the Mississippi to St. Louis itself, or continue southward on the Great River Road as IL-3.
We opt for the latter, passing through towns with Egyptian sounding names until we come to Cairo, at the southern tip of the state, where the Ohio and Mississippi rivers meet. We meet I-57 again and then continue into the town itself on US 51. Cairo (pronounced KAY-RO) was once a significant center of trade along the rivers. But it has been in a long decline, and now has a population of about 2,800. Indeed, some views of the town make it look nearly abandoned.



At the eastern edge of Old San Juan, two of the streets merge for the start of PR 25, the Avenida Juan Ponce de Leon, which continues east past the Capitol building of Puerto Rico. PR 25 and PR 1 leave the island of San Juan via a pair of causeways to the main island, where PR 1 becomes a major freeway. As it curves around the central city, we observe a very different kind of architecture. The modernist curving Puerto Rico Convention Center has won numerous awards.

We exit the city east on PR 26, which becomes PR 66 in the city of Carolina. And after the freeway ends we continue on PR 3. Eventually we turn south onto PR 191, which is the goal of this side trip from San Juan. This small highway winds its way upward into the El Yunque Rainforest. It is the only true tropical rainforest in the U.S. National Forest System




Back in San Juan, we head southward through the center of the island on PR 52. This is a busy toll expressway, but outside the cities it stretches across hilly countryside in the interior of the island. As we approach the southern coast, we can stop at one of Puerto Rico’s few highway rest stops and see both human-made and natural landmarks, the Monumento al Jíbaro Puertorriqueño and Las Tetas De Cayey.


With on in mind, we continue west from Ponce on PR 2 – this is the same PR 2 we encountered in San Juan, as it traces the coast on the western half of the island – and stop at the ruins of the CORCO refinery.
It’s a no-brainer that a tropical island like Puerto Rico would have beaches. But the southwest corner of the island apparently has some of the most scenic and less populated beaches – which is what I would prefer if I was there. We exit PR 2 onto PR 116 past the town of Guánica, where we come to Las Paldas and La Jungla beaches. We conclude with this video of quiet beaches on Guánica Bay.





















The most iconic of the many crossings is the Detroit-Superior Bridge carrying US 6 and US 20 across the river into downtown. The name seems a little odd, as we’re not in Detroit and Cleveland is on Lake Erie rather than Lake Superior. But it connects Detroit Avenue with West Superior Avenue and thus the name is quite appropriate. It rises high above the river and is quite picturesque against the downtown skyline.
Looking towards the lake from this bridge, one sees how closely packed the crossings are, and the diversity of shape, height, function, and level of disuse. In the picture below, we see the blue bridge carrying a major freeway, State Highway 2, beyond that a rail bridge, and in the front the ruins of the older Detroit Avenue viaduct.



We depart Cleveland continuing on I-90, and then switch onto I-71 to journey diagonally across the length and breadth of the state. It winds through the suburbs, crossing many other highways before intersecting our friend I-80, which runs across the state as the Ohio Turnpike. The Ohio Turnpike is familiar from numerous cross-country trips, with the rolling hills and suburbs giving way to a much straighter road over flat terrain and farmland as one heads west. But in this instance, we continue south on I-71 towards Columbus, the state’s capital and largest city.








We begin in the Northeast Kingdom of Vermont along State Highway 114. It winds its way from the most remote northeastern corner of the state and The Kingdom State Forest eventually into the towns and lakes of the region.
We can follow VT 16 back to Interstate 91, the main highway in and out of the “The Kingdom”. Heading south on I-91, the terrain looks a lot like eastern New York, hilly and forested. We turn off the highway onto US 2 and head west to Montpelier, the state capital. It has the distinction of being the smallest state capital in the U.S.
It is in Montpelier that we turn onto Interstate 89, which crosses the state diagonally from New Hampshire in the southeast to the Canadian border in the northwest. Along the way it connects the capital to the largest city, Burlington. Although I-89 never enters the city, it is easy to connect to the downtown via US 2.

Lake Champlain contains several large islands, particularly in its northern half. US 2 traverses most of these, including Grand Isle via a network of bridges and causeways before heading west at the north end of the lake, where Vermont, New York and Quebec all meet.



Back on I-64, we can head west onto Interstate 81 which runs along much of the Appalachian Mountains. It passes through hills, valleys and towns along the way, and is indeed a major corridor for the interior eastern US, connecting the northeast with the south. As such, it connects to our next state.
We continue on I-81 into Tennessee, where it ends at I-40. Here we leave the interstate and head south first on TN 66 and then US 441 to the Great Smoky Mountain National Park. It has the distinction of being the most visited national park in the U.S. It offers great views of the southern Appalachian mountains, both scenic vistas of the mountains and details such as streams and waterfalls.



Continuing westward on I-40 through the state, our focus shifts to music. Nashville is of course a major music-industry center, both in terms of records and musical instruments, and is synonymous with country music (though in fairness the city is home to other types of music as well such as alternative rock). But I think I would identify more with its neighbor to the west, Memphis. Memphis is home to important early blues, but I think it is the later Electric Blues, early Rock-and-Roll and Memphis Soul (as epitomized by Stax Records) that most interest me – even as a mostly “experimental” composer, the sounds of these genres are a strong influence. I can’t personally speak to an I-40 musical rivalry between Nashville and Memphis, but perhaps some readers may be able to contribute here.
Indeed, I-40 is named the “Isaac Hays Memorial Highway” on its eastern approach to Memphis. Long before he was Chef on South Park, Isaac Hays was a leading figure in Memphis Soul on Stax. I-40 and I-240 together form a beltway around this city’s outer neighborhoods, but its downtown and many of its most famous landmarks lie further west, between I-240/I-69 and the Mississippi River. Just off this highway south of downtown is the Stax Museum on McLemore Avenue. Further north on off I-240/I-69 is large exit for Union Ave, which carries several number designations all at once (US 51/64/70/79). Union Avenue was once home to Sun Records which produced many of the earlier Rock-and-Roll artists of the 1950s. Union Avenue also provides access to Beale Street.



















We begin where we left of in 
The shapes and textures of the rock formations and the sparseness of the landscape are what attract me to the southwest. The unique combinations of climate, water and rock composition lead to this landscape, and individual varieties of rock (many of which are different types of sandstone) lead to the distinctive shapes in different locations. Sometimes the most interesting can simply be found on the side of the road. But that does not detract from the many iconic parks in this state. Indeed, if we continue on US 160 west to its terminus at US 89, and then further west along State Highway 64, we come to the most iconic of all, the Grand Canyon.





Leaving the park, we turn back west on I-40 to Flagstaff, and then head southward on I-17 towards the Phoenix metropolitan area and a very different Arizona. But along the way, we pass by 









Heading back west on I-10, we switch to I-8 through the southwest corner of this southwestern state. We turn south on State Highway 85 through relatively empty but rocky landscape. Highway 85 intersects with 86 at the small town of Why, named for the “Y” shape of the original intersection of the two highways. Because Arizona law required location names to have at least three letters, the name “Why” was used instead of “Y”. Continuing south on 85, we eventually reach Organ Pipe Cactus National Monument.

We initially entered from the northeast on I-76. The road was relatively straight here amidst softly rolling hills of the High Plains. The landscape is dotted with farms amidst open grassland. The Rocky Mountains appear to rise from the plains quite suddenly, as does the city of Denver.
On that original family trip, we did not actually stop in Denver, but here we will do so. We turn south on I-25 along the edge of downtown Denver, passing through the interchange with I-70 known as “The Mousetrap.” We exit with US 6 which is surprisingly enough Sixth Avenue in Denver. Actually, it’s a freeway, the “Sixth Avenue Freeway.” Heading east in the freeway, it empties out onto city streets near the Santa Fe Arts District. A quick look at the websites for the galleries along the corridor suggests a relatively conservative selection, though I did see some interesting things from Sparks. Further north we find the 


I-70 and US 6 descend from the Rocky Mountains into the town of Grand Junction, where they meet US 50. One can exit the interstate here and travel on State Highway 340 through Grand Junction and Fruita to Colorado National Monument.


