Write an essay (about 2 pages) to introduce time mean and space mean speed (definition, relationship,
etc.) and explain why space mean speed, not time mean speed, is used for traffic flow analysis. You can
search the articles on the Internet to collect related information (using any format for references you
use). The grading is based on the following rubric (full score is 30 points):
Criteria Inadequate= 2 (Below
Standard)
Adequate= 3
(Meets Standard)
Above Average= 4
(Exceeds
Standard)
Exemplary= 5 (Far
Exceeds Standard)
Organization Writing lacks logical
organization. It shows
some coherence but
ideas lack unity.
Serious errors.
Writing is
coherent and
logically
organized. Some
points remain
misplaced and
stray from the
topic. Transitions
evident but not
used throughout
essay.
Writing is
coherent and
logically
organized with
transitions used
between ideas and
paragraphs to
create coherence.
Overall unity of
ideas is present.
Writing shows
high degree of
attention to logic
and reasoning of
points. Unity
clearly leads the
reader to the
conclusion and
stirs thought
regarding the
topic.
Level of
Content
Shows some thinking
and reasoning but
most ideas are
underdeveloped and
unoriginal.
Content indicates
thinking and
reasoning applied
with original
thought on a few
ideas.
Content indicates
original thinking
and develops ideas
with sufficient and
firm evidence.
Content indicates
synthesis of ideas,
in-depth analysis
and evidences
original thought
and support for the
topic.
Development Main points lack
detailed development.
Ideas are vague with
little evidence of
critical thinking.
Main points are
present with
limited detail and
development.
Some critical
thinking is present.
Main points well
developed with
quality supporting
details and
quantity. Critical
thinking is weaved
into points
Main points well
developed with
high quality and
quantity support.
Reveals high
degree of critical
thinking.
Grammar &
Mechanics
Spelling, punctuation,
and grammatical
errors create
distraction, making
reading difficult;
fragments, comma
splices, run-ons
evident. Errors are
frequent.
Most spelling,
punctuation, and
grammar correct
allowing reader to
progress though
essay. Some errors
remain.
Essay has few
spelling,
punctuation, and
grammatical errors
allowing reader to
follow ideas
clearly. Very few
fragments or runons.
Essay is free of
distracting
spelling,
punctuation, and
grammatical
errors; absent of
fragments, comma
splices, and runons.
Style Mostly in elementary
form with little or no
variety in sentence
structure, diction,
Approaches
college level usage
of some variety in
sentence patterns,
Attains college
level style; tone is
appropriate and
rhetorical devices
Shows outstanding
style going beyond
usual college
level; rhetorical
rhetorical devices or
emphasis.
diction, and
rhetorical devices.
used to enhance
content; sentence
variety used
effectively.
devices and tone
used effectively;
creative use of
sentence structure
and coordination
Format Fails to follow format
and assignment
requirements;
incorrect margins,
spacing and
indentation; neatness
of essay needs
attention.
Meets format and
assignment
requirements;
generally correct
margins, spacing,
and indentations;
essay is neat but
may have some
assembly errors.
Meets format and
assignment
requirements;
margins, spacing,
and indentations
are correct; essay
is neat and
correctly
assembled.
Meets all formal
and assignment
requirements and
evidences
attention to detail;
all margins,
spacing and
indentations are
correct; essay is
neat and correctly
assembled with
professional look.

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