This is Street Wars, a weekly series on the battle for space on New York’s streets and sidewalks.

Commuting by bus in New York City can be an exercise in frustration. The wait can be long. The ride through traffic can be slow. This time of year, the heat makes everything worse. And some bus stops are significantly sweatier than others.

A recent study by Transportation Alternatives, a transit advocacy group, found that the absence of bus shelters or shade trees leads to higher temperatures on certain routes and at certain stops. Some of the hottest are in Queens and the Bronx.

While New York is home to more than 15,000 bus stops, only one in five have bus shelters and just one in three are near tree shade, according to the report.

“It is a huge public health issue with the growing heat every summer, and worsening bus traffic, as there are more cars on the street,” said Em Friedenberg, a research manager at Transportation Alternatives.

The researchers mapped out how hot each of the city’s neighborhoods are in the summertime by averaging several years’ worth of data. Then they calculated the average temperatures logged at individual bus stops.