There's been a lot written about the new Seattle South Lake Union Streetcar, but I'd like to contrast it with a tram line that opened last month half a world away in Nice, France.
The Nice "tramway", like Seattle's, runs at grade and the vehicles look quite similar, although the French made trams are much more stylish.

Nice Tramway - Place Massena, Nice, France
The Nice line, the first of three planned, is only 5.5 miles long, but includes 21 stops and costs a rider about $1.80. End to end the ride takes about 30 minutes. Contrast that to the seven stops on the Seattle line that covers only 1.3 miles in 15 minutes.
While the Seattle line only has two concurrently running streetcars, resulting in a 15 minute wait at each stop, the Nice tram has 20 "rames" (or trams), that each hold up to 200 people and run every 4 to 8 minutes. 126,500 people live and 42,000 people work within 400 meters of the the Nice tram line, which is 37% of the population of Nice, and covers one-third of the jobs. The trains run from 5am to midnight.
Total cost for the Nice tram line service: €560 million (or about $784 million). Not cheap. The plan is for another couple of lines, taking the total length of track to 21 miles. An extension on the current line, and a second line will be completed in 2010, with a third added in 2015.
However, this has had a transformative effect on the city of Nice, which is fast becoming a jewel of a city for more reasons than just the natural beauty of the waterfront. Unlike the Seattle Streetcar which has to compete with car traffic, the Nice tram has few impediments. Entire streets have been turned over entirely to the tram line and pedestrians. Tram lines run over landscaped grassy areas to improved aesthetics. Indeed the FAQ explains: Pourquoi avoir choisi un tramway?
Le tramway est clairement apparu comme la meilleure solution. Son coût est quatre fois inférieur à celui d'un métro et contrairement aux bus, il n'est pas assujetti au code de la route, bénéficiant ainsi d'une priorité absolue à tous les carrefours. Ce mode de transport a fait ses preuves dans bon nombre de villes françaises (Grenoble, Lyon, Strasbourg, Bordeaux...).
Translated: Why choose a tramway?
The tramway clearly emerged as the best solution. Its cost is four times less than that of a subway, and as opposed to buses, it isn't subject to the rules of the road, benefiting from absolute priority at all intersections. This mode of transit has proven itself in a great many French cities (Grenoble, Lyon, Strasbourg, Bordeaux...).
It should also be noted that they intend to convert what effectively is "bus rapid transit" as has been proposed locally, into the second tramway line. BRT is not a goal, but a stepping stone.
Pretty much most cities of a population of 100,000 or more in France now have a tram service. Here is a partial list with 2005 populations in parentheses: Bordeaux (230,600) - Opened in 2003, 180,000 riders daily
Toulon Provence Méditérranée (166,800)
Montpellier (244,300)
Anger (152,700) - Targeted for 2010
Caen (109,200)
Grenoble (156,600) - Since 1987
Lyon (470,400) - Opened in 2001
Marseille (820,900)
Mulhouse (111,700) - Opened in 2006
Nantes (281,800) - Since 1985
Paris (2,153,600) - Since 2006
Saint-Etienne (175,700)
Nice's 2005 population was 347,900.
The Nice tramway is the latest in a long line of urban rail transit projects in France, and certainly those in other towns are even better examples of what can be achieved, with more lines, more stops, faster trips. The service typically combines parking, bus rides and tram rides under one ticket. Locally, while we have free suburban park and ride stops, within the city of Seattle we don't have such combinations. In Bordeaux, their new tram lines increased usage of the entire transit system by 25% between 2003 and 2005.
The city of Seattle is contemplating creating more streetcar lines, and so looking at what other cities are doing is highly educational. Americans have an addiction to cars and driving that has been a hard habit to break, but with the emergence of alternatives, in particular the soon to be complete Sound Transit line from downtown to the airport, we might finally get a taste of what it is like to benefit from useful urban light rail. In the process, these new transit options can become the catalyst to transform a city if we have the leadership and imagination to use them to do so.