Teenage drivers have high crash rates due to immaturity and lack of driving experience. To reduce their accident involvement, many states in the U.S. and countries around the world have implemented graduated driver licensing (GDL) programs.
<p>Air quality has become one of the important factors to be considered in making transportation improvement decisions. Thus, tools are expected to help such decision-makings. On the other hand, MOBILE5 model, which has been widely used in evaluating air quality improvement, become helpless when the transportation improvements are sensitive to factors such as acceleration/deceleration, grade, etc. which are not modeled in MOBILE5 model. For example, improvements can be made to reduce the grade of a ramp, thus reduce high acceleration and deceleration.
The MOBILE5 model, widely used in evaluating the
impacts of transportation investments on air quality, is
insensitive to the effects of acceleration or deceleration
on emissions and thus cannot model the effects of
improvements such as a reduction in grade. The
problem with MOBILE is that it uses average speed as
the only variable to represent driving dynamics which
are strongly related to vehicle emissions. These
dynamics are often not properly characterized by
average speed. The objective of this study was to
As more and more people have forsaken city-center activities in favor of out-of-town shopping malls and business parks, many downtown areas in the United States have been allowed to fall into neglect. Will Central Business Districts (CBDs) or 'Main Streets' survive these forces? Unless proper measures are taken and necessary investments made now, the future of Main Streets may be in danger. Is it worth investing in Main Streets in New York State?
Professors Satish Ukkusuri and Jose Holguin-Veras of Rensselaer Polytechnic Institute (RPI), as a result of an RFP process through the UTRC, have been selected by a selection committee to conduct an assessment of the emerging and promising technology that is likely to impact transportation in the NYMTC region.
Speed limits have been introduced for many reasons, e.g., to reduce gas consumption, to reduce the frequency and severity
of crashes, and in some cases to reduce noise. The objective of this research effort was to conduct a literature review to
assess the effect of increased speed limits on limited access roads regarding safety, travel speeds, and other unanticipated
impacts including shifts in lane distribution, traffic diversions, and spillover effects. Following are the conclusions:
In 1974, a national maximum speed limit (NMSL) of 55
mph was introduced to reduce the consumption of fuel.
NMSL was followed by a dramatic reduction in the
number of fatal crashes and Congress decided to
continue with the 55 mph speed limit. In 1987, states
were allowed to increase the speed limit to 65 mph on
certain rural interstates. New Jersey did not change the
55 speed limit at that time since 'very little mileage
qualified as rural interstate.' In May 1998, New Jersey
Many communities in the US and around the world—whether urban, rural, or suburban—are interested in providing effective paratransit services that are also reasonably good performers from the viewpoint of environmental sustainability. Herein, paratransit will be understood in the general sense of flexible passenger transportation that does not follow fixed routes or schedules, and often serves the transportation needs of the handicapped or elderly. Typically, paratransit systems exist because laws and regulations require the services to be provided, and because governments are able to provide the needed subsidies. Public or private operators who deliver paratransit services often do so via fleets of vans or mini-buses. Paratransit ranges widely in terms of the flexibility of the provided services, which can range from relatively inflexible transportation along a more or less defined route, to fully “demand responsive” service that offers door-to-door transportation, on-demand. Given the governmental subsidies needed to support paratransit, policymakers are increasingly considering ways to operate paratransit systems more effectively. Likewise, they are increasingly interested in the environmental sustainability of paratransit.
As more and more people have forsaken city-center activities in favor of out-of-town shopping malls and business parks, many downtown areas in the United States have been allowed to fall into neglect. Will Central Business Districts (CBDs) or 'Main Streets' survive these forces? Unless proper measures are taken and necessary investments made now, the future of Main Streets may be in danger. Is it worth investing in Main Streets in New York State?
